At launch, the 4th generation Apple TV lacked support for the iOS Remote app. The only way to navigate the interface and enter passwords and other information was through the use of the new Siri remote. An unintended consequence from the lack of support for the Remote app was that Switch Control users were for the most part locked out from using the device. Yes, you can do quite a bit with Siri on the new Apple TV using only your voice, but Siri doesn’t work for everyone (it does not always recognize the voice commands if the person using the remote has a speech difficulty or strong accent, and it can’t be used to enter passwords).
Fortunately, this limitation was addressed with the latest update for the 4th Generation Apple TV (tvOS 9.1). Now it is possible to use the Remote app on an iOS device to control the Apple TV (you must turn on Home Sharing and be on the same Wifi network for this to work). Since the Remote app is optimized to work with Switch Control, this means that switch users can now control the Apple TV just like any other user. In Item Mode, Switch Control will recognize hotspots in the touch area located in the middle of the Remote app interface. By selecting these hotspots the switch user can navigate in any direction and launch apps or interact with any of the controls on the Apple TV.
The addition of Remote app support is not only a great convenience for all users of the Apple TV. It addresses a major omission in the otherwise excellent support for accessibility on the new Apple TV, which I have covered in a number of recent posts.