I'd like to see/expect to see, within the next year to two tops, a single device you carry in your pocket, like my fascinate, that runs a multipurpose os that I can dock with storage/display/keyboard/mouse at home or work and use as a computer, keep in my pocket on the go and use it as a small form factor device as my fascinate is now. Basically alleviating the need for multiple devices altogether. It'd be so neat to not have to move things back and forth between one device or the other, or have different application/os setups to maintain/deal with.
Apple isn't far off from this, if they implement a full blown osx implementation on their devices, say add hdmi or dvi out and a couple usb ports on ipad, they'll basically be there.
We're soooo close to this level of functionality now. Phones have 1ghz cpus and are pushing 1gb of RAM now, which is more than adequate to boot and actually use Windows XP, albeit not well suited for gaming/graphics, but still...the POTENTIAL is there.
It's called an N900: http://maemo.nokia.com/n900/