I just tried winbloze 8.1, and I have to say, its bad. Why would I want to turn my expensive desktop into a cell phone computer?
I ran it on my mac mini under Parallels to try it out. Its way less friendly than 7, and has no redeeming features that I have seen.
For me, the only reason I need windows at all is that I have one CAD program that only runs on windows.
Out it goes, and Win 7 goes back in.