Thierry de Coulon composed on 2018-02-20 13:43 (UTC+0100):
Why is another question - the screen in front of me is a 27" , 1920x1080 one and I can't see any reason for changing it.
That's 81.6 DPI, roughly equivalent to a '17"' CRT running 1024x768, and pretty crude unless you back away from it quite a bit. DE's and web browsers typically floor at 96 logical DPI.