An excerpt from the full article (link below) : ...DRM has become much more than that. It's now a behavioral modification scheme that permits this, prohibits that, monitors you, and auto-expires when. Oh, and sometimes you can to watch a video or listen to some music.
The basic point is that access control technologies are becoming more and more refined. To create new, desirable product markets (e.g., movies for portable digital devices), the studios have turned to DRM (and the law) to create the scarcity (illegality of ripping DVDs) needed to both create the need for it and sustain it. Rather than admit that this is what they're doing, they trot out bogus studies claiming that this is all caused by piracy. It's the classic nannying scheme: "Because some of you can't be trusted, everyone has to be treated this way." But everybody knows that this nanny is in it for her own interests.
Privately, Hollywood admits DRM isn't about piracy.