You know some of us don't care about having retina density display. I just want tons of big ass text. I'm mid thirties and still have very good vision but I'd rather have super easy reading of large text on a gigantic ass monitor with tons of pixels than super crisp anti-aliased fonts on my normal sized monitor. Hell, i've considered one of the 50" tvs for my desktop and just standing slightly further back.
In general with these monitors I can stand back in a more comfortable position than lean forward like I did when I was 24 with my ~2500x???? 30" crt I had back then. Sure I could get tons of stuff on that screen but I can get more on a bigger one here.
In fact I remember what I really wanted back then was that same resolution on my 12' projector image. That would have been amazing.