Apple along with its iOS 5 and Mac OS X 10.7.2 updates has slipped out a corresponding update to the Apple TV. Its 4.4 update doesn’t yet have a full feature list but is known from beta testing to share its roots with iOS 5. Support is expected for iCloud features like Photo Stream.
We plan a full update if there are visible updates in the new firmware, which is available only by checking from the Apple TV itself.
Update: The upgrade is a significant boost to the Apple TV and adds not just iOS 5 features like AirPlay Mirroring and Photo Stream but specific new apps. Sports fans now have an NHL app that lets them watch live games and on-demand highlights while checking scores. WSJ Live is also new and lets users watch the same news, opinions, and other clips as on the mobile app.
Movie trailers now have a significantly reworked app to improve discovery over the old version.