If you haven't tried the Vive, try it. Room-scale is everything. Also don't do anything in VR that forces artificial movement without employing some technique

If you haven't tried the Vive, try it. Room-scale is everything. Also don't do anything in VR that forces artificial movement without employing some technique to counter the nausea (Google Earth VR does this well, for instance). It will never be true immersion. There will always be some level of unreality to it until we figure out how to plug a computer directly into our nervous system.