As far as I'm aware, the proposed mechanisms for this have to do with the distance to the focus point -- in other words, the fact that the display is close, not that it's a display. The virtual distance to the display, and hence your eyes' focal distance, is definitely something you can change in VR, and presumably also AR, so I think this would actually presumably be better, wouldn't it?
My AR glasses (viture xr pro) have a focus distance of ~3m. I actually find them more relaxing to look at than my monitors or epaper displays, and that focus distance is what I attribute it to.
Did you paste the wrong link? This meta-study does not seem to say anything about "up close".
From the abstract:
> Study selection: Primary research articles investigating the association of exposure to digital screen devices (ie, smartphones, tablets, game consoles, computers, or television) with myopia-related outcomes
