Good UI latency used to be standard:

https://danluu.com/input-lag/

(most recent HN discussion: https://news.ycombinator.com/item?id=33683278 )

The fact that it requires niche hardware and software (not "indescribably" niche) to achieve in modern times is a failure of the computer industry, not a problem with my argument. Low standards do not make mobile devices good.

And touch screen are impossible to fix even with niche configurations. I have no way to shrink my fingers to pixel size, and no way to make them transparent.