A little late to the party but two things
The WTF cab: yeah this is taking the LCD Marquee idea but to the next level. Only the next level is many years away. I don't doubt somedays we will be able to have screens with holes, are super durable, no heat and flexible. Until that day, skip any thought of this
Howard: What high end have you tried. Specifically, have you tried the Valve Index running at 120hz or 144hz? most people can't see the difference but those like you who have issues maybe can. If you haven't tried the Valve Index at the high end refresh rate than I'd challenge that you've tried a high end headset. I love my Valve Index and I also love my Rift S, but the Rift S runs at 80hz, pretty ok for me but I could appreciate people having issues with the Rift S. Secondly a friend has a Valve index but his PC isn't cutting it IMHO so there is more reprojection going on than there should. So yeah he's got a high end headset but it's not running high end, so if he's running at 90hz, he's really running at 45hz. This is something I saw at one of the VR Arcades, they were running Valve Pro's and you can TELL there was reprojection going on so I could handle it but it was noticeable!
Anyway just wondering the high ends you've tried, was everything working ok? Who knows? Finally, it's something that's been discussed in the VR thread but some people just cannot handle any artificial locomotion so anyone playing those no matter what headset or specs, if you are moving in the game but you are not in real life, quite a few people can't handle it. This isn't much different than those who get motion sickness from riding in a car. You are right that there is a segment that can't handle VR, though I'd challenge any percentages. In saying that, there are some that can't play FPS games either yet that segment of games is still well represented.