Apple TV With 120Hz Refresh Rate? tvOS 14.5 Code Hints At New, More Capable Apple TV Device

Current Apple TV 4K does not support 120Hz, even with a software update. That is because the current-generation Apple TV is equipped with an HDMI 2.0 port - limited to 4K resolution at 60Hz. To enable 120Hz refresh rate, HDMI 2.1 is required.