Of course, the secret to maintaining a de facto monopoly is to not push your customer base too far. Every industry segment has its breaking point, a fact Microsoft learned the hard way with Windows Vista. With Vista, they ignored IT, choosing to instead kowtow to big media and the DRM crowd. The result was an unprecedented backlash as angry IT shops spurned Vista and drove the Save XP campaign to international attention.
Perhaps Kennedy means that it's not DRM per se that's the problem, but Microsoft's failure to include in Vista goodies of interest to a preponderance of Enterprise IT shops.
Personally, I'd like to avoid Vista for as long as possible because XP works. I very seldom have problems that can be traced back to the OS rather than to apps. But I'm not running an Enterprise-scale environment either.