https://wccftech.com/apple-tv-6-120hz-support-ios-14-5-beta-code-leak/

Out of several rumors surrounding the Apple TV 6, one that would often garner attention is how powerful it would be compared to previous iterations. This would make the new hardware tailor-made to run games on the Apple Arcade service. Unfortunately, what good is all that hardware when you do not have high refresh rate support to make the experience an enjoyable one? Well, turns out Apple is working to bring support for this mode, according to the latest iOS 14.5 Beta code leak.

The latest iOS 14.5 Beta has added multiple references to tvOS’ PineBoard, with 9to5Mac reporting those references as ‘120Hz’ and ‘supports120Hz’. These terms strongly suggest that the Apple TV 6 could provide 120Hz support right off the bat. The current-generation Apple TV does not support a 120Hz mode and not even a software update will lift this limitation. This is because the current hardware features an HDMI 2.0 port, which is limited to 4K 60Hz.