wwee
One area that I disagree though:
> The idea of a 4k monitor is NOT to get more pixels but to get the pixel-perfect, high-density UI rendering. Otherwise, a normal 1440p display would work better.
Not in my experience. Sure, 2x scaling is ideal for sharpness. But there's a tradeoff with screen real estate. I regularly switch between a 1440p monitor at work to a 4k monitor @1.5x scaling at home. Fonts are still noticeably sharper on the 4k monitor.
4k @1.5x scaling is not pixel-perfect, but definitely sharper than 1440p.
[1]https://matklad.github.io/2020/04/13/simple-but-powerful-pra...
[2]https://matklad.github.io/2020/04/15/from-pratt-to-dijkstra....
Worse still, fixes tend to take a long time to land.
As an example, fractional scaling from NVIDIA cards is broken in 20.04 (what's new): https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/187340... and there is no fix in sight.