Yeah, I was seriously tempted by the Atrix when I picked up a replacement handset for the too-frustrating O2X earlier in the summer. In the end I just couldn't justify the extra expense of the dock, and the Atrix didn't have enough of the features I wanted without it. I've messed with x86 ICS in a VM though, and I think it (and therefore Jelly Bean) actually makes a pretty decent desktop OS - probably as good as ChromeOS - for general stuff (web browsing, music, email, basic office etc.).
There's no reason that Windows 8 devices couldn't do the same: 7" tablet that docks into a 13" laptop dock or a desktop dock - one computer, three distinct usage patterns.
tbh I'd even take having to plug it in with a cable rather than having a neat dock. I just want one device that fulfils all my computing needs - that's not too much to ask is it?