[crooked-v]

> aligned on whole real pixels

Remember that you're working with two screens, not one, and they have to have coordinated projections that will also depend on the user's IPD.

[fnordpiglet]

Interpupillary distance fwiw

https://en.m.wikipedia.org/wiki/Pupillary_distance

[g-b-r]

Well ok, but is it a problem to have the text aligned on both screens, if the user is fine with some "stuttering" when moving or with keeping the virtual screen fixed?

[crooked-v]

It's a problem because a given piece of text isn't going to match the same pixel boundaries on both screens.