It was hinted at before release, and it is now official: Guitar Hero Live is playable on the new Apple TV.
The new Apple TV has an emphasis on Apps, which includes mobile games. Players can download the Guitar Hero Live app, and pair the new Bluetooth enabled guitar to the following devices:
Apple TV, iPad Air, iPad Air 2, iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPad Pro, iPhone 5, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus and iPod touch 6
You can also play the mobile version of the game without a guitar controller.