[agildehaus]

1-to-1 motion certainly seems to eliminate motion sickness. I can't remember a single instance of getting nauseous with a room-scale Vive experience and I've been in that headset for numerous hours.

I've tried a couple seated flight-sims. You simply can't see distant objects as well as you'd expect due to the low resolution of the panels, which is far more important in flight sims than with most other things. I can't say I got sick, but it didn't feel real to me, and I can see how others might get sick.

4K and, later, 8K VR should solve a lot of that.