I actually posted a thread on here about it, though it got locked before I could make any more updates =V
Right now I'm just running the Consumer Review, there's already a new version of the "Beta" released, which is supposed to be as close to the release as we're gonna get to use, for free.
In all honesty, it is Windows 7, just given a new coat, buffed, and shined.
This is in no way, however, a "Vista" as some people are trying to label it.
Yes, it has a new Start Menu, using the Metro style that can be found on Windows 7 Phones, Xbox 360, and Zune. Is it that awful? No, it really isn't. You'll hardly even us it if you can manage it. In all honesty, it's more slim lined. Some things are easier to find now, than they were in Windows 7. You still have the Control Panel and all those functions, as well as a new Settings screen/app, and more.
It also has a lot more support for wireless devices via Bluetooth, etc. It's also got great Multi-Screen support, as well. It's also lighter on RAM, and seems to be a bit faster in terms of file transfers and things of the sort.
The *only* issues I've had thus far, are a few obvious compatibility glitches among programs, and the fact that it changes from the DirectX SDK to Windows SDK, which means that some games won't recognize DirectX on the machine, when it in fact is still there. (This seems to be mainly an issue on older games, and PC Ports.)
ALSO something to note. It is still rumored that Microsoft may release Windows 8 with a "true desktop" variant, which'll allow you to use Windows 8 on a desktop, like you would normally use Windows 7, though this somewhat defeats the purpose of Windows 8, you still do get the new features that come with it.