Yes, after you start watching Blu-ray, the resolution is noticeable when you watch a SD DVD, but it doesn't kill the experience. All of these players upscale standard DVDs too, so they at least do look a little better than before sort of giving them a freshening so it isn't like you are going to toss all your DVDs all of a sudden. I've been mostly buying titles on BD that I didn't have, new titles, and a few that I did simply because they look better on BD.