1080p that fills a 90* angle of view would be like looking at a 40" 1080p TV from ~28 inches away. Certainly not the same experience that you're used to with a retina display, unfortunately.
That's if you're looking at the full screen. Imagine walking closer, and having the resolution "increase" as you get closer (because you have the same number of pixels, looking at less "stuff" per pixel).
I'm not sure people would see the benefit of using it if you had to peer so close that each character took up a third of your displays just so it was at a comfortable resolution.
