I used the release candidate for a while dual booting with Win 7 and did not find it very intuitive. I accept that there learning curve whenever you switch to a new O.S. but this was one curve too far. Perhaps I'm getting too old but it shouldn't be a case of teaching 'an old dog new tricks' but increasing the usefulness of the ones already learned. With my experience so far its got to be a big 'Won't be using Win 8 from me.
No plans for Win 8. My desktop is still young, and I'm about to buy an Android tab and/or a netbook (or something more netbook size with decent laptop spec, android or windows).
I've only seen Windows 8 in youtube videos. I'm unimpressed so far. Though I don't know if I will be sufficiently underwhelmed, when the time comes, to actively avoid having it on a new desktop; path of least resistance and all that.