iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Fixed Apple TV 6.0 Update Reinstated After Being Pulled for Bricking Issues
Following the software’s initial Friday release, there were multiple reports that the update caused critical errors for a number of users, necessitating a full iTunes restore. The newly updated software presumably fixes those issues.
The Apple TV's 6.0 software offers a number of new features, including iTunes Radio, iTunes Music Store purchases, iCloud Photo updates, Podcasts, and AirPlay from iCloud. It can be downloaded from via the Update Software tool in the Apple TV settings menu.