I can't see a world where I start preferring VR Gaming to PC Gaming.
Although I must say that in my opinion Graphics is the least important aspect of a game. In fact for myself Graphics is so not important in games, that it actually is bad for games. I just can't have fun with these hyper realistic looking games, they draw too much away from actual gameplay elements.
One of my favorite games that I still play is Old School Runescape, and I mean . . . that game hasn't had a graphical update in like 20 years.
Agree, gameplay is more important, but I think for VR better graphics could indeed be a selling point, because graphics plays a bigger role in VR, VR is all about the new 3D experience. Better graphics could increase the initial wow factor and attract new gamers to VR.