The last Apple TV update occurred back in September following the public release of iOS 7 for the iPhone and iPad. That release added support for iTunes Radio, AirPlay from iCloud and new podcast functionality.
On Tuesday, Apple added a new iMovie Theater channel to the Apple TV. The new channel is designed to work in conjunction with a new feature in the Mac and iOS versions of iMovie that allows users to share clips and videos seamlessly between their Apple devices.
According to Apple's Apple TV software update page with, version 6.0.1 includes "general performance and stability improvements. The update is available through the Apple TV's over-the-air update mechanism via Settings / General / Software Update.
Article Link: Apple TV Software Updated to Version 6.0.1