Safely predicting the present :)
...I could even see a situation where you carry around all your computer work on a PDA, then "plug in" in one of the those standard cradles. Your certificate in the PDA would tie you in to the "net" (hopefully not .NET) and connect you with your work/home/whatever server. Your standard config is loaded on the PDA and you can work anywhere one of these cradles exists.
Yup. The "standard cradle" is called "WiFi". The "net" is called "the 'Net", and my standard config is already on the machine in my hand, thank you very much. Bugger roaming profiles when the hardware roams just fine.
I predict all the flap over T-Mobile-WiFi-in-Starbucks for $X/hr will go away (not tomorrow, but soon), as local coffee shops, bars, mass-transit facilities, city parks (and entire cities) put 'em up for free.
