iOS 4.3 brings new multi-touch gestures to the iPad. The new four and five finger gestures makes movement much easier, quicker and better; pinch to the home screen, swipe up to reveal multitasking tray, swipe left/right to switch apps.
Test Multi-Touch Gestures for iPad
This beta release contains a preview of new Multi-Touch gestures for iPad. You can use four or five fingers to pinch to the Home Screen; swipe up to reveal the multitasking bar; and swipe left or right between apps. We are providing this preview before releasing them to the public to understand how these gestures work with your apps. Test them and give us your feedback on the Apple Developer Forums.
Personal Hotspot to all iPhones
As expected, Apple has pushed personal hotspot feature to all iPhones on iOS 4.3 but it'll work like tethering on AT&T, likely with those fun-time data caps. No word on AT&T yet.
New Camera Effects
As noted by iSpazio, iOS 4.3 beta 1 firmware files hints at some references to new effect in the Camera app. The effects are; Thermal Camera, X-ray, Kaleidoscope, Normal, Tunnel of Light, Collapse, Turbine, and Enlarge.
New FaceTime Icon, Full Screen iAds
As reported by 9to5mac, iOS 4.3 brings a groovy, new FaceTime icon (above) as well as a new full-screen iAd banners and adds Airplay and Apple TV services (not apps on Apple TV -- yet) for apps. Specifically:
AirPlay Video support is now available as an option for developers in the MPMoviePlayerController class. It is also available to web authors via the QuickTime Plug-In or media element
Brings Back Orientation Lock
It seems like Steve Jobs changed his mind and decided to bring a new setting lets you choose for the switch to be an orientation lock or the new mute switch (via MacStories):
iPhone 3G and iPod touch Support Drop
As we reported, iPhone 3G and iPod touch 2G have been discontinued as of iOS 4.3. Both of the devices are not listed anymore on the iOS developer website. This indicates that the latest iOS build for iPhone 3G and iPod touch may be iOS 4.2.1.
source : geohot