The way things are going, DVD may become extinct or a remote secondary mechanism for distributing content. NYT has an article that summarizes the direction of content delivery.
The decade-old DVD moved two small steps closer yesterday to technology’s endangered-species list.
Wal-Mart, the country’s largest seller of movies, announced that next year it will begin testing a video download service on its Web site.
…
In another sign that the race to put video content online is accelerating, the Internet firm BitTorrent, once a pariah for enabling vast unauthorized video file-sharing, plans to announce today that it has struck distribution deals with eight media partners, including 20th Century Fox, Paramount and MTV Networks.
This does appear a natural course of evolution.