Now this is interesting. While I do believe there is a future for hybrid tablet-PCs, I do not believe the hardware technology is quite there yet. I'd love to one day be able to do full-time web development on a hybrid, while being able to hold my 500 GB of personal photos/video, and not having to pay over $999. That day will come eventually.
As for the software side, this "Continuum" concept seems like a great step in the right direction.