Eww motion sickness.
A few mates who VR have that but luckily I seem to be immune.
I'm a strange cookie in as much as I can play some pretty "intense" games like detached, and adr1ft, I've spent nigh on half my adult life working in the oil industry, predominately on rigs in the North Sea, and I've only been sea sick once, and had a couple of instances of the dizzy/headache prelude in twelve years in the North Sea. But that virtual flatscreen, sorry, but no... Mere minutes and I was done. Every time I moved my head and the screen didn't follow, vestibular alarms started ringing, moving the head back to recentre the view didn't cancel the alarms, it just set off more alarms.
I only bought Odyssey to try out this VR implementation, and I really tried to make this ViRtual flatscreen work. If I forced myself to keep my head as bolt rigid as I could, like my life depended on it, I could play for about 40 mins max. But at the end of it my head and kneck hurt, I was still mildly motion sick, as you DO move your head numerous times involuntarily, and with the effectively reduced resolution of the virtual flat screen, granted I've got an older headset rift CV1, my eyes were nipping and I hadn't enjoyed my gaming session, and now felt like I had a mild hangover from it. That's why I started riling against the ViRtual flatscreen / grey burquah in the alpha forums, it was put in game purportedly to stop "people barfing in their headsets" to quote Stephen Benedetti, but it had the exact opposite effect on me.