I used to have an early VR headset. With 3DoF headtracking, 640x480 at 60 Hz (combined, so actually every eye got only half of that). Descent supported stereoscopic 3D and the headtracking could be added to almost every game with a mouse driver. It was bad. Really bad. Descent alone could be nausea inducing. In VR it was a literal pukefest. Still I had to try it every few months or so, because it was so cool on paper.