Apple has seeded tvOS 11.3 beta 2 to developers for testing. The build number is 15L5175d.
tvOS 11.3 includes new features, bug fixes, and security improvements in the OS and SDK, including:
● Enhancements to Match Content support.
● Automatic frame rate switching on Apple TV (4th generation).
● Automatic mode switching for AirPlay video sessions.
Notably, with an Apple TV and an iPhone on iOS 11.3, beta users can try out AirPlay 2.
Developers can download the new beta from the link below. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.