DRM is not so bad, so long as it's not restrictive. If I can play my music anywhere, any time and on any device, without having to pay for it many times over, and at a minimum of CD quality, then that's fine. Anything else makes it evil spawn of the devil.
Oh, and no rootkits (looking at you Sony!).
So does PlayReady also include movies? I wonder how Microsoft feel about Blu-Ray "winning" at present, considering Sony's additional DRM features (namely the ability to disable Mandatory Managed Copy) basically knacker the concept of PlayReady and similar MS concepts. It's no wonder MS back HD DVD ;)