(And for people who don't want to watch: it appears, based on the demo, that it handles conversation flow dramatically better than Siri does, but I'll need to actually play with the real thing to know whether that's just presentation veneer.)
I just recently switched back to Android (Motorola Razr Maxx) and will be switching back this weekend when I upgrade to the Nokia Icon. This latest update is coming out a lot sooner than I thought. Unreal.
Sounds very promising. If MS has cracked this problem, this could be a serious value proposition for Windows Phone, especially for the enterprise market they are finally going after. The new CEO, while certainly not responsible for starting these developments, seems to be focusing the company at pushing out the right kind of innovation.