Days after beta 4 was released for iOS 10.2, watchOS 3.1.1 and macOS Sierra 10.12.2, Apple has thrown the fourth beta of tvOS 10.1 into the mix for developers.
Developers testing their fourth-gen Apple TV users in the USA will get the new TV app in tvOS 10.1 beta, which aggregates existing cable TV provider content from their respective apps, while allowing for single-sign on for cable services. Unfortunately, Canada does not support the new TV app yet (who knows if it ever will, given how a few companies control our media here).
tvOS 10.1 beta 4, build 14U588 is now available for download in the developer centre or over-the-air. No word on any major changes in this beta but stay tuned.