Jonathan Peterson has a short piece on why the DMCA is not about copyright infringement, but about preventing compeition and, more importantly, why this won't work (Why Open Computing Will Beat Closed Media).

DRM has nothing to do with protection from piracy and everything to do with protection from competition - and that is a losing battle. The record companies can’t manage to agree on standards for DRM. Even if [they] did agree, consumer electronics companies would want their share for helping to lock in the content and telcos would want a slice for carriage. Multiply by hundreds of different regulatory environments worldwide, and is it clear that a monolithic, secured, un-hackable Medianet cannot be created. [emphasis in original]