The thing that caught notice here was the MS inclusion of the memtest tool rather then tossing their own memdiag crap they had for some time in. Seeing that as an option was good news for Vista users there since that's a high rated memory diagnostic tool.
This is nothing new, MS has purchased Linux based companies and even used open source code in their products.
I'm not surprized at seeing them borrow ideas from other OSs like the OS X since they wanted to improve the "image" of the new Windows while lacking in other areas! But with any new version they come out with there is always complaints to go along with any favorable items a newer version offers.
You know this only holds true with Microsoft. You never hear anyone in masses complaining about speed, overall performance or compatibility with any other OS like Unix, Linux, OS X, etc, like you do with Microsoft. Most people will say that is because there are more users, which is a fact, there are more windows users, but that doesn't make it better.
XP was a huge improvement over their previous OSes, and Vista is just a disappointment. Everything from how they marketed it, and to how crappy it performs. Where as, my 3 year old PC can run any Linux distro out there and even the newest ones no problem, and my 3 year old Mac desktop, heck my 4 year old mac desktop can run OS X 10.5 with really no issues or major performance hits at all.
I really hope they fix all these issues with Vienna, and toss in EFI support, the new file system support like ZFS, and fix the terrible I/O performance that windows has always had. I also hope they don't feature limit with tons of different versions, just make one OS, that really gets on my nerves. Once you start to feature limit something, you get nickeled and dimed to get what you really need, or there is one feature you needed but didn't know at the time.