See the [Secure Digital Music Initiative] website for a view from one of the leading content protection organizations.
See John Gilmore's essay [What's Wrong With Content Protection] for an essay highlighting problems with content protection.
See LawrenceLessig's book, CodeAndOtherLawsOfCyberspace for his opinion that we will not be entering an era of free and open information, but the most heavily controlled and regulated era of all time.