Dude, you're seriously deluded.
If MS locks out the hackers (which I don't think they can, to be brutally honest), people aren't going to be lining up to buy Vista.
Rather, I think they're going to resort to at least one of four other alternatives.
a.) Find a way to hack the image and then post it as warez
b.) Continue using XP or other earlier versions of Windows
c.) Tell MS off and use Linux, BSD, Mac OS X, etc.
d.) Crack an earlier alpha, beta, or gamma (RC) build of Vista and use that
Not to mention that Vista has so many holes, MS will be backpedaling to release fixes like it did with the XP Goldmaster.
LOL, go right ahead, if that's your thing. But that ain't most people's thing, so don't blame us when you get busted.
Yeah, their market share really crumbled then. /SARCASM