When considering displays, it would be best to figure out the pixel density per angle of view, which depends on the expected distance between your eyes and the

When considering displays, it would be best to figure out the pixel density per angle of view, which depends on the expected distance between your eyes and the screen. So if a screen is 1800px wide and you position it such that it takes up 90 degrees of view, then it is 20px per degree, or 0.05 degrees per pixel. So a phone may end up needing a higher resolution than a larger monitor because you hold it closer. Although I haven't run the actual numbers.