The effect takes hold quicker if I'm looking at someone else playing but even when it is me controlling the action I will be ill within minutes. If I let it get to that point the only solution is to go to a dark room and lie down for an hour or more.
I sometimes joke about it, but in reality I do worry about a future of HUDs and VR environments.
From the two available theories I find the Sensory Conflict Theory the more compelling although I'm still not convinced they have entirely cracked it.
Along with gaming I get similar effects from 3D movies. I struggle to understand the postural challenge that comes from watching a 3D movie vs a 2D movie in the same cinema seat. From my lay persons perspective it would seem to have more to do with the ability of my eyes/brain/inner ear processing more information simultaneously and making contextual sense of it.