It has been a long time since the Apple TV was updated, but it performs well for 4k content so I’m not sure what the average user would want from an upgrade. Personally the only item on my wish list is very niche - allow it to concurrently connect to more than 3 Bluetooth devices, so I can use more sensors with Zwift.
> I’m not sure what the average user would want from an upgrade
I'd like to see a new revision with an HDMI 2.1 port -- support for 8K60 game streaming (the nVidia 3090s support running at that resolution) and 4K120 support.