[samatman]

So this part is pure trigonometry: how much further does a monitor like this have to sit on your desk, to have the same pixels-per-steradian as a 4k 27"?

Yeah. That's what I mean. Just a little further away, same pixel density. It's nice.

[copperx]

On the other hand, brightness decreases 1/distance^2. You would need a brighter panel to achieve the same brightness at a farther distance.