Just keep in mind that 4K/60fps is hard to pull off even on high end PCs on some modern games.
If you want 60fps at 4k, you should expect current graphical standards. 4k is awesome, but I don't mind 1800p, or even 1440p if they can dial it up. Most of the time, when I see PC games on Highest settings, they are running 1440p.
Look how good The Division 2 looks on PC at 60fps on a 1080. We will get a good bump.
The difference is that The Division 2 on PC at max settings looks a lot better than even the Xbox One X version. The Xbox One X has minor graphical effect bumps over the regular Xbox One version, resolution being the main defining difference.