The Xbox One X is for people who have been convinced that they need to play games in 4K. The reality is that most people still don't have a 4K television, they're fine with 1080p, and they would barely notice the difference between the two. Honestly, most of the people who only own consoles don't even care about 30fps vs. 60fps, yet here is Microsoft marketing this latest console on tech specs and buzzwords.
Add on the fact that the Xbox One X won't be running most games in true 2160p, and the ones that actually do will be running at 30fps with huge graphical downgrades.
The PC is just an entirely different machine for a different demographic. It's much more versatile in what you can do with it; you WILL get more use out of it in your daily life. You can upgrade any part whenever you want. You can sell your old parts and make money back. The physical dimensions of it can be as big or as small as you want.
On the gaming side of things... The games are cheaper, and you can buy them from whomever you want. Online multiplayer is free. Valve's Steam client backs up and synchonizes your saves across your all your PCs/Macs for free. You can literally run your games however you like; resolution, framerate, graphical effects, etc. can all be modified at your own liking.
Honestly, if you are the type of person who cares about framerates, resolution, anti-aliasing, etc. and having the biggest library of games to choose from, you're doing yourself a disservice by not taking a serious look at gaming on PC. Microsoft has already said that all their future exclusives are coming to PC, so even less reason to stay on Xbox consoles.
If you're absolutely against a PC and you really want a console, even then I wouldn't recommend the Xbox One X. A PS4 Pro has pretty much all the games you're going to want to play, it has all the great Sony/Japanese/indie exclusives, and it's $100 cheaper than the One X. Only reason to get a One X is if you already have all your digital games on Xbox.
