2021 Apple TV 4K is ‘Future-Proof’, Remote Inspired by iPod Says Exec
4K HDR streaming in 60FPS supported, despite it not being the norm yet.
Apple TV 2021
Apple Working on eARC Support for Newly Announced 2021 Apple TV 4K
The feature is labeled as being in beta in tvOS 14.5 RC and tvOS 14.6 beta 1.