Apple TV had a bit of beta with the release of tvOS 12 Developer Beta 7 on Monday. The beta version is available for the fourth generation Apple TV and Apple TV 4K.
tvOS 12 adds support for Dolby Atmos to Apple TV, support for zero signing for cable service providers who opt for the feature, new screensavers for the international space station, etc.
tvOS 12 supports the fourth generation of Apple TV and Apple TV 4K. The public release of tvOS 12 comes this fall, with iOS 12, watchOS 5 and macOS Mojave.
Developers can register their Apple TV in the beta program of Apple Developer Website. The corresponding public beta should arrive later today.