But none of those issues matter to me, except perhaps black level to some extent. I am not a photographer, designer, or gamer.
I'm in that rare niche of being somebody who codes, writes, reads all day, and wants high dpi just for the "printed paper" like text quality.
Also, I feel like Apple has made a limiting move in terms of font rendering. Because the entire desktop is upscaled, and then downscaled, fonts only truly look sharp at 200% scaling. So, not only do I need to hunt out a Retina display, but then I can only use it in one mode.
Whereas Linux and Windows render fonts completely separately to the rest of the desktop. So you could have 169.56% scaling, and your fonts would look equally sharp to 200%. In fact, because of cleartype even my QHD 120 dpi display at work is decent.