Read the article carefully and it says something to the effect that Vista will not allow uncertified drivers to play on the New Vista operating system. With Microsoft's stalwart support for HD-DVD, they might not certify any Blue Ray drivers making them unplayable on any future computer than runs Vista. Of course this is just speculation at this point but Microsoft is no stranger to playing hardball and have experienced one or two lawsuits in the past. However it stacks up or plays out, it looks like Microsoft's support for HD-DVD will be a bigger factor than the BR fanboys have stated.
This does not sound good for Blue Ray:
" unsigned drivers will be revoked and premium content will not play when such drivers are running on a PC"