From my direct experience it's a quality thing. Once we're at 4K per eye @ 120FPS or something approaching this - and able to maintain it steadily without dropping frames, it's going to be a pretty mind blowing experience. The problem is right now the resolution and framerates just aren't there to make it feel visceral enough. I think even with just a sitting still model of a headset that has ultra high resolution and frame rate will be an iteration where things start to take off. I'd love to see things take this direction over trying to solve the problem of physically moving in a 3 dimensional space while engaging with VR.