I like a 4:5 display, but they don't really make them any more (or if they do, there's one or two choices)
I’d pay about $500 for a square 2160p 30” screen. But then I’m a cheapskate and I have no way to justify even the $500 cost when I could get a couple 27” 2160p’s on sale for that.
It’s the aspect ratio I grew up with, but 14x the number of pixels and 4x the screen size, but probably half the weight and power consumption!