I really must agree, with much of what has been said. The idea of sitting in a plane full of people yapping on mobiles, CUE: the Nokia tune - "I'm on the plane...(louder)..I SAID I'M ON THE PLANE, YES THE PLANE..(shouting)..P-L-A-N-E"
I actually enjoy the fact I can't be 'got' by anybody, either by E-mail or phone when I get on a flight.
I don't think it will be fun for the crew either.