This question has puzzled me for a long time. The new monitors in market have very high resolution and I find the need to increase font size while viewing webpages (Ctrl+ in Chrome). As far as text reading is concerned is there really any difference between using the high res display with a large font size or just using a normal font size on a lower resolution display?
Let's say previously I had a monitor of 1920x1080 resolution and used to read text at 12pt font. I upgraded to 2560x1440 resolution and now find that to make the text legible I have to increase the font size proportionately to something like 16pt. Am I really gaining anything from the high res monitor?