Windows 8 does work for users
I've been following W8 since the first preview release. I'd got frustrated at the change in UI and the user experience when installing it on my PC's. Just like many of the commenters here I'd been prepared to write it off and continue with W7.
Two things have changed my mind.
1) Installing W8 on a Samsung Slate. It doesn't really matter that the install and set up process was almost as painless as installing OS X, but the user experience of W8 on a touch device just works. The metro interface is easy to use for tablet type tasks and there is still the ability to access non-metro applications. I expect that software producers will over time re-target those apps that are appropriate to the metro interface further improving my use of the tablet.
2) I loaned my tablet and a keyboard to a very non-technical friend and after just a couple of minutes walking them through the screen they took to it with no problems. They didn't care about loosing the start menu, they were already comfortable with the idea of scrolling through pages of icons from their smart phone. When using the tablet they had a seamless transition between keyboard, mouse and touch screen and didn't have a bad word to say about it.
As a technically competent person I am getting on with learning how to get the most out of Metro. The step seems much smaller than going from NT to XP.
My "typical user" seems much less resistant to change than I expected and sees W8 as a fusion of their smart phone and PC.