In real life, your eyesight, screen size, and distance from screen very much influences things. You have a fixed image size of 1920x1080. It's going to look vastly different between a 32" LCD and a 83" DLP. And of course how close you are sitting will affect how well you can see it. Hell, my wife can't tell the difference between 480 and 1080, but my 10 year old son will immediately complain to me if walks in and sees a 480 source on (my how times change) Key here is I am talking about real life viewing situations, in everyday terms, I'm not factoring out anything to reduce it to a bunch of techno-babble the average Joe sitting in his easy chair won't care about.