I don't have an opinion on this subject, but I do enjoy DVDs. I have not seen either of the new generation of high definition DVDs, those being Blu-ray and HD-DVD, in action. I understand they are both pretty awesome looking and sounding if you have a high definition TV.
I was working in a music and video store in Seattle when DVDs came on the market. VHS was still a bigger deal, but there was a competing DVD format, too, known as Divx. Divx was a low-cost DVD that worked with a player that was connected to a modem. After an initial free period, subsequent uses of a Divx DVD were charged to your credit card. This seemed to me self-evidently a terrible idea. The format was disontinued due to a lack of support from both consumers and the movie industry. As far as I know, though, there is no such distinction between Blu-ray and HD-DVD.
Harry Knowles of Austin, Texas and Ain't It Cool News wrote this past week that he had bought an HD-DVD player, and predicted that this would be the ascendant format. Then, a day or two later, the website The Digital Bits posted a rebuttal in which they explicitly endorsed the Blu-ray format. Incidentally, they seem like nice people on that website, and also Midwestern.
Here's Harry Knowles' HD-DVD posting.
Here is the Digital Bits response favoring Blu-ray.