Wrapping up my new #Tetent Timespy [gd0136] design, I curiously looked at other high refresh rate panels <3.81" and found https://www.panoxdisplay.com/tft-lcd/2-9-inch-lcd-2160x2160-vr-90-hz.html

The outer dimensions are 54x59mm, so it might be a valid alternative to my initial idea of 4 tiny 1080p displays since they'd only cost 1/10th of the latter. I'm just slightly concerned about the brightness, but only because I don't know how bright of a display I'd need.

Additionally, I'd imagine guiding the screens furthest away from the eyes would be almost as challenging as my 5.5" screen idea.