The N800 is *just* under typical UMPC size. It slips into almost every shirt and coat pocket I have (and some pants pockets). That's not by accident.

But this is the scenario I envision: your main computer is small, iPod Touch small. On one end is access to say a card edge connector (or mini usb) that lets you plug this little thing into a laptop form... or a desktop form... or a car dash form... so basically you tote around an engine that has at least what the N800 + iPhone offer now in accessibility and the processing power of a decent laptop.