Whilst I expect and welcome performance increases, and the other bit's and bobs.
If if doesn't support phone use it's a waste of time, I really don't want to have two contracts. One for my phone and one for my Nokia.
For me that is the _must_ have.
I am very happy with my n810 (and previous n800).
That said, If it's nice enough I'll probably get one and just tether it to my phone like I am doing at the moment - although that would be very very annoying!

Unless I'm missing something obvious? Like having two phones on one contract, is that possible?