The SpriteKit version of TilemapKit runs on Apple TV without any hitches. The screenshot to the right was taken in the Apple TV Simulator.
I’m still working on getting Cocos2D to work with Apple TV. As of now, I’ve been able to build and link Cocos2D into an Apple TV app, but can’t launch it.
If you are also pursuing the task of getting Cocos2D to run on Apple TV, please share your experience in the Cocos2D forum here.