No, not really eagle eyes, I have a prescription... I increased the fonts of Finder and any other app I use and that supports it to 16 points. The System preferences are still a bit small, but I do not see the pixels. All I see is a sharp display, with a plenty of real estate to arrange a lot of windows... I don't like multi monitor setup, and I have had 3 at one time.You've got some eagle eyes man. I use a 4K 27" scaled to 1440p. I still feel sometimes the texts are too small to read from 75~80 cm distance. 50cm would be a perfect distance for me in this situation. But I want some space in front the monitor so I can write from time to time. Eventually I choose to scale to 2304x1296.
Edit: just to be precise, I measured my sitting distance, my eyes are 78cm from the top edge of the display.