Check this out! I'd prefer ASUS just put WP8 on the PadFone but who knows if they will. With this one you'll be able to put your WP8 phone into it. Just more proof that the evolution of the smartphone is underway.
It's an interesting idea. The disadvantage I can think of is the carrier automatically charging you for tethering in the states.
But how could they do that? I mean technically your still using your phone, it's not like your tethering it to the tablet. How could they even tell the difference?