> The best an eye can discern is roughly 20 microns
The size of an object doesn't matter. What matters is how it gets projected onto the back of your eyes.
There are 120 million rods (black and white) and 6 million cones (color) in a single eye. You would need at least as many pixels. But photoreceptors are not evenly distributed, so to account for moving your eyes across the screen, you would have to have even more pixels.
What if the would move the screens? E.g. Similar like they have in camera optical stabilization they slightly move the sensor array. They could make screen with not uniform pixel density but more dense in center and then do eye tracking and shift those screen mechanically depending where eye will be focused. Probably not easy to pull off as camera optical stabilization (need bigger movements and screens more heavy than weight of camera sensor) but maybe not completely impossible? Oled screens are very tiny and flexible just probsbly hard to make it non fragile.
The size of an object doesn't matter. What matters is how it gets projected onto the back of your eyes.
There are 120 million rods (black and white) and 6 million cones (color) in a single eye. You would need at least as many pixels. But photoreceptors are not evenly distributed, so to account for moving your eyes across the screen, you would have to have even more pixels.