Blackbox kernel or blackhat dream ?
Of course, the biggest loser here is the poor consumer.
Security through obscurity doesn't work -- MS ought to know by now.
By "blackboxing" the Vista64 kernel MS has just thrown down the challenge to every blackhatter out there - and tying the security industry's hands behind their backs.
Who gets to deal with the fallout, the popups, the adware, the keyloggers, the viruses, the blacklisting for zombiespamming ?
The poor consumer.
I pity MS - they finally had a serious chance at becoming respectable, and offering a serious desktop operating system - but instead, their desire for total ironfisted control and bundling as much mediocre apps to cover up for their own coding failures lost them their chance.