This is an interesting article entitled “A Cost Analysis of Windows Vista Content Protection” by Peter Gutmann (pgut001@cs.auckland.ac.nz),
It’s really for Windows people to help decide on upgrading to Microsoft’s new OS, Windows Vista.

It’s stupid, how the fact that, you can’t play a protected audio content over S/P DIF output (which for audiophile will be a big no), and cannot play HD video content on an HD-ready monitor (yes you can watch and do everything else that monitor can do, except playback of HD video content, how stupid…).

I mean, just look at the Table of Contents, list of things you lost because of Content (Over) Protection :
Disabling of Functionality
Indirect Disabling of Functionality
Decreased Playback Quality
Elimination of Open-source Hardware Support
Elimination of Unified Drivers
Denial-of-Service via Driver/Device Revocation
Decreased System Reliability
Increased Hardware Costs
Increased Cost due to Requirement to License Unnecessary Third-party IP
Unnecessary CPU Resource Consumption
Unnecessary Device Resource Consumption

How obviously that Content Protection is a big NO.