This should worry non-Windows users much more than Windows users. Fairly soon Linux, BSD, OSX, any other OS (including mobile OSes, like PalmOS), and old version users (isn't Win2k said to be the best for most business applications?) may be shut out from watching, listening to, or reading much 'mainstream' content, producing yet another monopoly for Microsoft... Unless they want to become 'outlaws', and break the DRM themselves (with the help of that vast resource that is the internet
) just to read a book.
It's either this or corporations will smarten up, and actually think about how many people still buy things (DVDs, CDs, etc.) legally, even when they could grab them off the internet as easily as Googling for a torrent. DRM will always be eventually broken, people who want to pirate things will always pirate things, and people who buy good content will still buy good content.