The more you blow things up in size, relavtive to resolution, the less detailed it becomes.
If you think of 40"+ TVs back before 720p and 1080p, where you could besically count each pixel on the screen, and had to sit far away from the tv to not be annouyed by the size of those pixels and how unsharp the picture at that size was.
Im guessing, a higher resolution would just result in a slightly prettier/sharper ect view.