Tbf at 4K I find you can turn off basically all AA and blurring stuff, and there's some games like Battlefield where it's almost impossible to tell a difference between medium and max while playing. I think there's a reasonable range of games (Racing, flight sim or e-sportsy stuff) where an RVII could also push 4K high into the upper end of the frame rate window.
But I guess the benefit of this monitor for most would be the ability to have a choice between high framerate gaming (Maybe at 1440p or 1080p) and 4K in one monitor.