This is headset, app and person dependent. I've done 8 hours in Elite: Dangerous (sat down, can't remember the headset) and well over 4 hours in Fallout 4 VR (s

This is headset, app and person dependent. I've done 8 hours in Elite: Dangerous (sat down, can't remember the headset) and well over 4 hours in Fallout 4 VR (stood up and moving around, Valve Index). Having demoed VR at my old office I can tell you that the range of reactions varies from an immediate "nope" and having to take the headset off to being able to stay in it for a significant amount of time with no discomfort.