If you're using 4 of them versus 3, wouldn't this require 1/3 more subpixels to achieve the same display resolution in pixels?
Or -using same # of subpixels per cm^2- would perceived display quality be similar due to better color representation?
Or -using same # of subpixels per cm^2- would perceived display quality be similar due to better color representation?
However, there are tasks that benefit from better color reproduction. There are also screens where the pixel size is well below the human discernable limit.