I've been using a MBPr 15" primarily for the past few months and I really like the crisp text and I really love it. I'm planning to set a powerful desktop now and am considering between Dell U2515H 2k display and Dell P2715Q 4k monitor. On the paper, crispness wise, the P2715Q, being a 4k monitor would clearly win. However, I want to know if at normal viewing distances, that would make any difference. I have this question because when I see the text scaling in my MBPr, the normal scaling says "Looks like 1440x900"(See picture)
I assumed that this means that we're not really harnessing the full potential of the retina display for such a small monitor and thus, any monitor would 113 dpi(1440x900 for 15") should look the same. Hence, I am inclined more towards the 2k monitor. Can anyone tell me if the crispness look the same in it like in an MBPr? Thanks in advance.

I assumed that this means that we're not really harnessing the full potential of the retina display for such a small monitor and thus, any monitor would 113 dpi(1440x900 for 15") should look the same. Hence, I am inclined more towards the 2k monitor. Can anyone tell me if the crispness look the same in it like in an MBPr? Thanks in advance.