I do like the idea of having all you computing needs with you at all times.
When on the road (or docked with just the tablet) the interface is "finger friendly" and when docked then it is keyboard + mouse oriented. I don't think the padfone is there yet, but maybe android can be both sometime soon...
I think (and as a linux user it pains me to say this) windows 8 is the only one on track to offer this experience, with classic desktop running in parallel with the metro interface. Once phones have enough processing power to do most of the things that need to be done by most people then I see the death of the laptop market, we will have phones and dumb docks when we need them. The desktop market will shrink but there will always be a need for high power workstations that phones just will not be able to meet