The fourth beta of tvOS 9.2 has been seeded to developers today. This comes two weeks after the last release. In this version of tvOS we see the ability to create app folders, a new app switcher UI, and dictation using the remote when a keyboard would be used. In this beta version, we see a firmware update for the remote that improves the motion sensor accuracy.
To get this update go to Settings > System > Software update > tvOS 9.2 beta 4.