Are you assuming uniform pixel density? A typical eye has ~1e8 rods, but they're very much not uniformly distributed. If you can place each "pixel" perfectly (f

Are you assuming uniform pixel density? A typical eye has ~1e8 rods, but they're very much not uniformly distributed. If you can place each "pixel" perfectly (for example with a retinal projector), you can get away with only a hundred million pixels or so; but if you want a uniform grid, then you need the pixel spacing to match the maximum angular acuity of the eye, which is several orders of magnitude more pixels. In either case, we're a few orders of magnitude off with current displays, although you can gain as much of that back as you want by reducing angular extent ("screen size").