I don't understand why 3:2 and 16:10 have taken over the mobile space but if I want one for my desktop my choices are 1920x1200 or a thirty inch, thousand dollar monstrosity with bad response times.
You can always buy a inch+10% 4k 16:9 display and just set a 3:2, 16:10 or whatever resolution with cropping edges, e.g. 3456x2160 or 3240x2160 (check if your vcard can do that). It may be hard psychologically, but it’s so less expensive.
There are some 30 and 32 inch 2560x1600 monitors, such as from Dell, but they're mostly geared toward offices and artists and have terrible input latency and response times.
Bad response times plague the mobile space too. Just look at the new MBP with its 120hz display that has >40ms latency. But Mac displays, though looking gorgeous, have always had latency that was heavily perceptible.
Is there even a mainstream desktop display that has anywhere near the latency of Macs?
The black to white latency is over 90ms, which is quite funny to me.
Macs have always been horrific for latency - I can always see the delay between me pressing a key and the letter appearing. But, I can also see iPhone OLED displays flick on and off due to their low frequency PWM, so this might be unusual pickiness from me.