I have been a member of Steam, for 14 years, and 3 months. Ever since Half LIfe 2 was released. And in that time, I have played only 48 games, out of the 216 I have. Mostly from sales, but all AAA games.
But point is, I find myself not really interested in PC gaming much anymore....Hence why I havnt upgraded in a LONG time. Everyone is different though. Yes, as posted above the PC will give you slightly higher resolutions but you may also encounter frame rate issues.
And with that being said, if it were "me"......Id keep the Xbox X. But if you dont, there is no way id take $200 for it. And I would definitely "NOT" trade it for a GPU either. The only one losing out will be you.
Edit: I agree....maybe trade it for a PS4 Pro.