Admittedly, I haven't read this whole thread (it's extremely long), but I fail to see what everyone is so enthused about.
Yes, for Mac users, this means running Windows natively on an Apple computer. This is welcome news for people for whom Virtual PC is not an ideal solution.
But as someone pointed out, this also opens up the Windows side of the Mac to all the viruses, spyware and other assorted crap that plagues the whole Windows OS. So you'd have to be very careful to use the Mac "half" of your computer for e-mail, internet browsing, and all those other "high-risk" applications. Myself, I'd only feel safe using the Windows side for standalone apps such as games.
From the point of view of established Windows users...what does this do, except turn Macs into expensive Windows systems? I don't know about you, but almost everybody I know who has his head stuck up his--- I mean, has his head stuck in the Windows world, looks for the cheapest Wintel box around...and Dell has been playing that card with enormous success.
Similarly, corporate IT departments tend to look for the cheapest computers they can find...and I can't see them looking favorably on one which requires that you buy Windows separately to install, and which, if they would use the Mac software at all, would require their IT staff to also know how to troubleshoot the Mac platform.
Maybe I'm just missing something here, but I see this being of greatest advantage to people who are already Mac users who just want to play Windows games. I don't see that this move is going to win Apple a lot of new converts from the Windows world, in either home or business use.