As technology improves, we can get more and more information, faster, over the internet. Which means watching high quality video. I can watch DVD-quality movies on Netflix on my computer or X-box, not from a DVD but streaming over the internet. More and more video games are becoming available as direct downloads, no discs required. Eventually you will be able to download anything you want to watch, listen to, play, etc. practically instantaneously. That is why DVDs are slowly becoming obsolete.