I mean there isn't a reason to upgrade to a Series X this year unless you want to maybe play The Medium, Scorn or any other small next-gen exclusive. Your current Xbox will serve your just fine for the cross-gen stuff if you are happy with visuals and performance there. What more do you want them to show you?
I can't play Monster Hunter: World (my GOTG) on my Xbox One X 60fps without load times. Or Sekiro without horrible frame pacing. I can't play Forza Horizon 4 60fps/4K on my Xbox One X.
I have zero interest in the launch games on either PS5 or Series X but backwards compatibility is the reason I'm going to buy Series X day one.
There's also 8ms of input lag on Xbox One controllers. With Series X that should drop to 1ms if they change the polling rate from 250hz to 1000hz as I would guess.