I've been waiting for the next generation of Nexus 7 since March to do the same, and I would actually use it, since I can pick it up and just put it down without having to fold it up or turn it off. And carry it with me. And have batterylife.
I don't think Windows does great on small screens (apart from WP8 which I love), I'd rather ubuntu completely on portables. I think it's an awkward attempt at solidifying two different things. It's got great desktop improvements over Win7, but their approach to and handling of the dual-OS? No, awkward.