Cowboydoc:
I surprised you don't notice a greater difference between HDTV and a regular screen. Do you receive an HDTV signal and do you have a HDTV converter box? Without these the picture quality will suffer. Unless people live near a major city that broadcasts HDTV or have a satelite dish that can recieve HDTV, your picture will not be significantly different than conventional TV. DVD's, digital cable, and conventional digital satellite are slightly better on a HDTV set. I saw an older movie (Toro, Toro, Toro) played on HDTV and the picture seemed worse than on a conventional TV.
The HDTV converter boxes are different between manufactures and a standard has not yet been adopted. Currently it is like the early days of VHS and Beta. Its difficult to tell who will be the next VHS.