Now HD-DVD will of course be better quality, but not by that much that I am going to run out and re-buy every DVD I have in my collection. But when I got a DVD players, there was such a huge quality difference, it was like watching a movie in a whole different way: Widescreen, Dolby Digital 5.1, Anamorphic, Chapter Search, Extras.
Now I never had a laserdisc player, but I know DVD is alot better than that too.
To me, I am satisfied with DVD quality movies, just like I have been with CD music for 15 years. If they came out with something better quality than CD's, I wouldn't go buying all my Rolling Stones and The Who CD's over again. That is the same for DVD, if Lucas releases O-OT as Anamorphic Widescreen, 5.1, I will be content forever.