iOS 4.3 has been shown at the running Apple Event, You can see the iPad 2 launch details HERE

some of the features of the upcoming iOS are

Personal Hotspot for iPhone 4 ONLYBoost in Safari Performance ( Nitro Javascript Engine)iTunes HomesharingAirPlay ImprovementPreference for iPad switch (Mute or rotational lockiOS 4.3 will be released March 11thFacetime support for iPad 2iMovie, a video editing software for the iPad 2 for $4.99Garageband AR Music software, let's you play any musical instrument off for iPad 2. priced at $4.99 again

Here are some pics of iMovie in action on the iPad 2

Here are some screens of Garageband for the iPad 2:

All Images are courtesy of EnGadget

Source: EnGadget