Apple's iOS 4.3 to debut March 11

From InfoWorld: Apple gave iOS users a glimpse at what to expect from its forthcoming iOS 4.3 update on Wednesday, when it previewed the mobile operating system at its iPad 2 launch event. iOS 4.3 promises improved Safari performance, wireless media streaming in the form of iTunes Home Sharing, AirPlay improvements, a Personal Hotspot option for the iPhone 4, and a preference setting for the iPad's side switch.

Scott Forstall, senior vice president of iOS software, was on hand to present the latest iteration to Apple's mobile operating system. He focused first on the improvements to Apple's mobile Safari app. To increase JavaScript runtime speed, the company incorporated Mac OS X's Nitro JavaScript engine into the app; as a result, iOS runs JavaScript up to two times as fast as it had previously.

iOS 4.3 adds iTunes Home Sharing to iOS devices like the iPad 2. The feature, which is already offered for computers running iTunes, lets you stream your entire iTunes library from a Mac or PC to an iOS device. That includes podcasts and audiobooks in addition to music, movies, and TV shows. The feature saves iOS device users the hassle of downloading or syncing content to their iPhone, iPad, or iPod touch.

The iOS update also tweaks the AirPlay feature that lets iOS device users stream content to their HDTV through the Apple TV set-top box. With iOS 4.3, third-party apps and Websites will be able to take advantage of full audio and video streaming using AirPlay. End-users will be able to stream videos from their Photos app, and they'll also be able to use built-in slideshow transitions from Apple TV right on their iPad, iPhone, or iPod touch.

Several device-specific improvements -- changes to the iPad's side switch and the addition of Personal Hotspot for all iPhone 4 models -- were also announced. As first seen in the 4.3 developer build, iPad users will now get to choose whether they'd like their device's side switch to mute or orientation lock the screen.

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