I found the high-resolution screen of the 11" MacBook Air gave me a headache and terrible eyestrain. I think that the LED backlight may also contribute to the problem. I doubt that the anti-glare coating has anything to do with the problem.
I think it may be another issue, and I've made my thoughts clear on it in various threads.
I don't want to start yammering on about it, as no doubt it will irritate some.
But I owned 4 2011 11" MacBook Airs -- now, some might call that insane, perhaps. But I'm well placed to be able to comment on screen quality/variability.
The LG panels gave me constant eye pain, and even after calibration, were washed out in appearance and seemed to have a noticeable grid pattern laid across it, this was especially noticeable when viewing crosstalk patterns. The Samsung panels were much,
much better calibrated out of the box and noticeably improved in terms of sharpness, without any "gridding" as seen in the LG panels, no eye pain whatsoever, and no crosstalk activation to boot.
The reason I bring this up is because I'm convinced that it is screen quality, rather than pixel density that is the problem here.
I'm typing this on a 2011 17" HRAG MBP, which has an almost identical pixel density to the 11" Air, and I have literally been using it for hours upon hours without so much as an eye twinge. When I was using the last 11" I bought, it felt like my eyes were ready to gouge themselves out of my head just to stop having to read from the screen.
Incidentally, this new machine is a Samsung panel, also. And a friend has a 17" Glossy with a Sammy screen that looks excellent.
Flame suit on, as they say.