Yeah, I actually agree with your review. I installed the official 7 Beta on our destkop PC. And, although I haven't checked it thoroughly I too must say that it works really smoothly, even with just 1 GB Ram and with some nice additional new features.
They indeed copied some things from the good old Mac, but as long as that helps to improve things, I'm pretty happy with it.
So, yeah: Good work, MS! =)
Btw, found a really funny comic dealing with Windows 7 (I love xkcd!) : xkcd - A Webcomic