It still boggles my mind how the differences in picture quality between 480p, 720p, 1080i and 1080p (along with the up-scaled version of all the above) are not visible to some people. Especially when the differences are so painfully obvious to me on a TV even as small as a 32" set and depending on build quality, even smaller. (PC monitor's excluded).
I also feel the same way with audio sources. I am not, as xlot4 stated, a "Tech Specs Junkie". I just am knowledgeable to what the specs mean and how they relate to the differences I see and hear.