The quality of life improvements alone make me want it day 1, especially when it comes to Xbox Series X.
If I can play Sea of thieves, Ori, Gears 5, Forza Horizon 4, Gears Tactics, numerous backwards compatible titles all at anywhere from 4k60fps to 4k120fps, let alone Minecraft with Ray Tracing, I am all there.
It will be worth it just for the OS improvements alone for me. Quick resume of 3-5 games at once, significantly faster loading times, butter smooth OS.
For once, I am also going to likely be able to play most of the launch titles without having to pay through the nose either, since I know Game Pass has my back.