Despite a much-publicized media leak of its next-generation iPhone, Apple CEO Steve Jobs still managed to rev up fans and developers Monday as he unveiled iPhone 4, a powerful successor in its smart phone line.

“Stop me if you’ve already seen this,” Jobs quipped as he introduced the iPhone 4 to a packed audience at Apple’s Worldwide Developers Conference in San Francisco.

From his customary spot on the stage, Jobs previewed the new, slimmer hardware, which comes equipped with a much improved screen, two cameras including one facing the user for video conferencing, a faster processor, a gyroscope and a mobile version of Apple’s video editing program, iMovie.

“That is the iPhone 4,” Jobs said. “We think it’s the biggest leap we’ve taken since the original iPhone.”

The phone, which will go on sale June 24 for $199 (16 gigabytes) and $299 (32 gigabytes), will also ship with the latest version of the iPhone operating system, now dubbed iOS 4. The new operating system includes multi-tasking, application folders, the iBooks e-reader app and a new mobile advertising platform.

IPhone 4 should provide a boost for Apple as it seeks to fend off rising competition from smart phone competitors, most notably Google, whose Android operating system is powering a slew of iPhone rivals. There are three times as many iPhones in the market compared to Android devices, but recent quarterly Android sales are now similar to the iPhone.

Many of the iPhone 4′s larger hardware developments were predicted after gadget blog Gizmodo purchased a lost iPhone prototype in April for $5,000 and ran an exclusive story on the components of the new device. The story shed light on many of the new features, including the two cameras and a bigger battery, as well as the boxier look of the device.

But Jobs summoned his ring-leading skills to highlight the specific advancements of the iPhone 4, saving until the end a new video chat feature called FaceTime, which will enable iPhone 4 users to easily conduct video calls at the push of a button. The service will only work over Wi-Fi between iPhone 4 devices in 2010.

“I grew up dreaming of video calling and now it’s real,” Jobs said.

Jobs also spent a considerable amount of time showing off the iPhone 4′s new display, which doubles the pixel density of the iPhone screen and eliminates the perception of pixels. At one point, however, Jobs ran into trouble during the demo when his device couldn’t access Apple’s private Wi-Fi network because of all the mobile Wi-Fi routers in use at the keynote. He actually paused and asked the bloggers in the audience to turn off their Wi-Fi to allow him to proceed with the demonstration.

The new device will feature the same 1 GHz A4 processor powering the iPad as well as a new gyroscope that, when combined with the iPhone’s accelerometer, allows the iPhone to work as a six-axis motion sensor. Developers believe the added sensor can bring about new applications in gaming.

The iPhone 4′s camera has been upgraded to 5 megapixels and includes digital zoom, an LED flash and advanced light-sensing technology that mimics the performance of dedicated cameras. The video camera can also shoot in 720p high-definition.

Users will be to stitch their pictures and videos into polished movies using a new $4.99 iMovie app for the iPhone.

Much to the chagrin of some consumers, Jobs made no mention of a second iPhone running on Verizon Wireless, a popular rumor among Verizon users. The iPhone 4 will stay an exclusive of AT&T, which also replaced its unlimited smart phone data plans Monday with cheaper but limited data tiers of $15 (200 megabytes) and $25 (2 gigabytes) a month.

Avi Greengart, an analyst with Current Analysis, said the Gizmodo leak may have taken some of the surprise out of Jobs’ keynote. But he said the details and execution in the iPhone 4 ensure the device is still the smart phone to beat.

“Just because a publication got some of the features doesn’t mean it’s not impressive,” said Greengart. “I am very impressed. Apple was ahead to begin with and this just puts them further ahead.”

Charles Golvin, an analyst with Forrester Research, said the new iPhone may sell more to existing iPhone users, rather than expand Apple’s reach. But he said he was most impressed by the display and the FaceTime video technology, which Jobs said Apple was releasing as an open standard.

“If they can drive the adoption of video calling, we might finally see the realization of video telephony,” he said.

For developers such as Ge Wang, founder of musical app maker Smule, the inclusion of the gyroscope meant yet another tool for application programmers.

“This is definitely a step forward for Apple,” he said of the iPhone 4. “It’s not only the technology but Apple’s vision for the future. Clearly, Apple isn’t standing still.

 

Apple Inc. today unveiled its long-rumored tablet, the iPad, not the name gussed by many bloggers such as iTablet or iSlate.

Chief executive Steve Jobs, addressing a packed crowd of technology journalists and bloggers. referred to the device as something in the “middle” — residing in a “third category,” between high-powered personal computers and smart phones.

The iPad has a 9.7-inch multitouch display (measured diagonally; a page of InvestmentNews measures 18 inches for comparison), weighs just a pound and a half, and is pretty thin at just half an inch. That’s lighter than any netbook I can think of and certainly any full-fledged tablet PC.

A 1-gigahertz Apple A4 processor will power the iPad. It will come in 16- gigabyte, 32-GB and 64-GB models. The table will have several means of connectivity, including built-in 802.11n Wi-Fi and Bluetooth 2.1 in both the base model and the high-end model. The iPad’s average battery life is expected to be 10 hours.

Oh, and like the iPhone, it will also have a built-in accelerometer, as well as a speaker and microphone.

Mr. Jobs said during the announcement that he could take a flight from San Francisco to Tokyo and watch video the whole time (side note: He must fly private jets, otherwise you’d think we would have seen some mobile phone images or video of the iPad before today).

As for cost: The low-end 16-GB model will go for $499. The high-end 64-GB model, which also boasts 3G technology, will sell for $829. There is both a touchpad keyboard that will take up half the screen when used, as well as a separate external keyboard (it is unclear what external accessories will be coming with which models in the box at purchase).

During the announcement, an Apple software representative said that iPhone and iTouch users will be able to synch their already purchased App Store applications with the iPad, meaning they won’t have to pay for them twice and that the applications themselves will all natively run on the iPad as well.

It was also announced during the presentation that these applications have already been optimized for the new device.

This means that advisers already enjoying the many financial-services-oriented applications available for the iPhone will be able to run them on the iPad as well. The device should make for lightweight travel and easy web-based presentations with clients or others.

History always seems to get lost with these grand announcements, especially when they seem to be in an-as-yet undiscovered category of computing. That probably has a lot to do with Apple’s naming this the iPad instead of the iTablet. Consumer tablet computers have been around for almost 20 years now.

Former editor-in-chief of PC Magazine Michael J. Miller wrote a great little piece documenting all the niftiest tablets that predate Apple’s announcement. Mr. Miller, who also happens to be a mentor of mine and my former boss, used to show off what these devices could do as they made their way in for review. Over the course of my eight years at the magazine, I saw dozens of them come and go. Thus it’s clear to me that Apple has built this shiny new device after long study of what has and hasn’t worked among its many predecessors.