CD has a rich ecosystem, filled with parasites -- entrepreneurial organisms that move to fill every available niche. If you spent a thousand bucks on CDs ten years ago, the ecosystem for CDs would reward you handsomely. In the intervening decade, parasites who have found an opportunity to suck value out of the products on offer from the labels and the dupe houses by offering you the tools to convert your CDs to ring-tones, karaoke, MP3s, MP3s on iPods and other players, MP3s on CDs that hold a thousand percent more music -- and on and on.Link
DVDs live in a simpler, slower ecosystem, like a terrarium in a bottle where a million species have been pared away to a manageable handful. DVDs pay no such dividend. A thousand dollars' worth of ten-year old DVDs are good for just what they were good for ten years ago: watching. You can't put your kid into her favorite cartoon, you can't downsample the video to something that plays on your phone, and you certainly can't lawfully make a hard-drive-based jukebox from your discs.