If you have more than one Apple TV associated with the same Apple ID, you can keep the same appearance and apps for each device. This makes it easy to switch between an Apple TV in the bedroom and one in the living room, for example.
° Open Settings on Apple TV.
° Go to Users and Accounts > [default user account name] and turn on One Home Screen.
(This how-to is based on my experiences and info on Apple’s support pages — where the images sometimes come from.)