The writing is in the build for a refreshed version of Apple TV



From Techradar:

That's not to say the next-gen Apple TV won't have something exciting to offer.

The build also references iOS 7's Game Controller framework. While this may be remnant code from the iPhone, iPad or iPod touch, there's a chance we're looking at reference to an actual gamepad that would connect to the new Apple set-top.

Previous rumors have suggested the next version of Apple TV would include support for new kinds of content, namely a dedicated App Store that may really be more of a Game Store.

  New Apple TV may have juiced up innards, game controller support