Apart from iOS 4.2.1 for iPhone, iPad and iPod touch, also released today is iOS 4.2 for Apple TV 2G which brings video AirPlay feature that will allow you to stream pictures, videos and music right from your iPhone, iPad or iPod touch to TVs connected to the second-gen Apple TV.
The big new feature in the update today is support for AirPlay, a new Apple technology that allows devices running iOS 4.2 or Macs and PCs running iTunes 10 to stream video over a local network and have it played back on a TV set via the Apple TV.
See all the new features of this new software update in the video walkthrough embedded below.
Video via MacWorld
Download iOS 4.2 for Apple TV 2G