Comment by Rizz

Human foveala, the central part of your vision, has on average about one cone every 30 arcseconds, but resolution of 20 arcseconds is still quite common because the variety in cone density is quite high. So someone with good vision, maybe someone who would naturally be inclined to work in graphics, would need over 430ppi at 2 feet, or 290 at 3 feet. This screen seems to be perfect for someone with good vision at 3 feet, if you place the screen closer you would need even higher resolution.