I guess it's all relative. To me, watching something in SD is like watching a 16:9 or other widescreen aspect ration film in 4:3. It just bothers me. (With Blu-Ray, we've finally moved beyond having fullscreen versions of films, which is just an added benefit). But sure, I suppose it's all relative. You don't need to have a 50" TV to experience the benefits of HD. Hell, just download the Star Trek trailer from Apple in HD and compare it to the SD trailer. Even on a small computer screen, you can instantly tell the difference.