KrustyboomerIt's not terrible depending on the monitor and how far you're sitting from it, but yeah, after 24" monitors that run at 1080p start to develop a noticeable screen door effect. I'd say for a 27" you can get by with 1080p, but 1200 or 1440 is much better.
KrustyboomerI'm comparing my 1440 27" iMac to my AOC i2757fh 1080p 27" monitor, and I can see a slight difference, but nothing to go out and buy a new GPU for... 1080p is fine at 27" unless you're a pixel scientist.