27" iMac has been 2560×1440 from 2009 until they went retina in 2014 (and they're now double in both dimensions, so same logical resolution).
At arm's length, on a 27" screen, 1440p is very practical. Getting more screen space than 1080p is what bumped me from 21-24" screens, and it fills my vision enough that if I jumped to 4k I'd either be moving my head back and forth with a 40" screen, dealing with even smaller UI elements, or wrestling with OS scaling.
At arm's length, on a 27" screen, 1440p is very practical. Getting more screen space than 1080p is what bumped me from 21-24" screens, and it fills my vision enough that if I jumped to 4k I'd either be moving my head back and forth with a 40" screen, dealing with even smaller UI elements, or wrestling with OS scaling.