I'm sure there's hurdles to overcome before it's a reality. Even if it's limited capacity, I think we're ready for gesture-based computing and I think Microsoft's closer to making that a reality than anyone else.
It'll be their first attempt with any hope of success. I'm thinking Kinect on a tablet, among other things. I don't think people were ready for tablets during Microsoft's initial offerings. Touch interfaces just hadn't come far enough.
I think it's going to be a tradeoff. For the price it might be worth the hiccups. It's hard to be sure, though. I love Android, I'm a complete fanboy, but as a pragmatist I acknowledge its flaws. This article is pretty spot on.