The trick will be finding a super portable monitor/keyboard/mouse.
Nope. I'd just have a dock at the office and one at home. The idea is to have a single and easy-to-transport device which fulfills all the basic duties of an office tool. Plus, no need to synch contacts and appointments. It's always available from a single device. Nirvana!
I imagine doing the emailing/communicating/surfing and document editing on the phone, with large data saved on an external drive. The phone docks to a screen/kb/mouse and off you go. Need to do heavier processing? Sure, remotely access the hardcore server/cruncher at the office from the phone+dock and do what you need to without overloading the phone. Cloud computing makes a heckuva lot of sense now, with 3G+ speeds
Now picture 'generic' neighbourhood offices with rows of docks, so you could "go to work", separating your home space from the work mindset, without commuting for hours. Also, employers save on the running costs of providing office space, whilst you're saving on the costs of commuting.
I love this idea so much!