I have to say, since I bought my new tv, and went back to using the component cable to connect my Xbox 360 (at 1080p as well :D) instead of the VGA Cable, I’ve noticed a significant increase in the picture quality of my DVD’s.
Now, I’ve watched movie’s on an HD DVD player at 1080p (full HD) before, and the image quality and sound is brilliant, I can’t say much for Blu Ray, as I’ve never watched a Blu Ray film as of yet. However, while my normal DVD’s are nowhere near the same quality as a proper HD source, the image quality is certainly FAR better than that of a normal DVD player.
I’m very impressed…I’m currently watching the Star Wars films on here - in what I call “Semi-HD” 
January 29, 2008 at 9:32 am
do you seriously mean that your older DVD’s got a better quality because of the new screen? or did you get the HD-DVD player at the same time?