well then, i stand corrected, either way, there's not many general users, or buyers of new PC's that'd know anything about the 20, 30, or so linux distros there are out there, and i'm fairly certain that the normal user would like to have some semblance of security when they crank their vista-laden PC, i'm sure vista will have its failings, then again, so does every other OS, and software that exists, nothing's perfect.
and again, i'm fairly certain that some clever geek with too much time on their hands in their mom's basement will cook up a way to get around this, and have a linux distro dual boot with microsoft's latest Operating system.
such limitations serve only to spur on people in the spirit of challenge, kinda like the great wall of china and genghis khan.
just wait, somebody will get around it, they always do.