Fast Vista penetration

It just hit me -- fast adoption of Vista by Windows users is probably a good thing for the Mac market share (and Linux as a cheaper alternative, of course). I know it sounds ridiculous, but listen to me for a second. A whole bunch of folks will upgrade either by purchasing a new PC with Vista pre-installed or worse yet by buying the ridiculously overpriced upgrade and installing it on their outdated hardware. And the stuff will break: microphones will stop working, printers will stop printing, apps will start crashing, annoying dialog boxes will start popping up everywhere, etc... and suddenly the prospect of switching to a completely different OS all their geekier friends can't stop raving about will become less scary! What do you think?