It’s not really for me but that would be an interesting move from Apple. Since they have a powerful chip to run AAA games and gamepad support has been improved. There’s no game streaming service on Apple TV as far as I know (it might not be possible at all because of App Store policies).
My dream: Apple starts offering “lossless” audio for AppleTV+ (using Dolby TrueHD Atmos) to push their service as more premium.
So they add support for that to the OS and allow apps like Plex or Infuse to hook into it with PCM+MAT output, like they’ve done with DD+ Atmos.