People don't want to hear that
I read a white paper once where the military / RAF were looking into their own simulators, not the cockpit ones but HMD ones and they determined that any FOV higher than 150-160 had a sharp increase in fatigue and sickness over shorter time periods, e.g. 15 mins max. Now there could have been a gazillion reasons why like low frame rate and old display tech as this paper was a few years old. I wish I could find it again, it was an online PDF with quite a lot of formulas and statistics to back up the research.
So, until I find the paper it's just my ramblings.
Oculus, HTC, Sony and Microsoft all seem to keep FOV fairly low and improve other aspects like pixel density. Why? They have vastly more resources to prototype a 210 FOV HMD, maybe they have and decided it's more health hazard and not future proofing their product line.
Please don't read this as a doom mongering post, the intention here is to see patterns, risk, challenge and hope I am wrong in this assessment.
Anyway, we won't know until after this testing week if Pimax have pulled a rabbit out the hat. People have backed a concept, a list of goals. I would love nothing more than to show the big boys that it CAN BE DONE! Then all hell will break loose as who would buy any other headset if they are ALL inferior to the Pimax visual experience. They would get swamped with orders and the backers can be proud they backed a winning horse.
This could be a Pioneer KURO moment