As I see it, a lot of the "Dockable Mobility" idea I'm thinking of (and that others seem to like), is arguably available in some of the UMPCs that are starting to appear. I'd like them to get a bit farther along for my own purposes, but a number of them are fairly close as it is.
For instance, you have the
OQO on the small side, and the
Motion LS800 on the larger end of the devices I'd consider 'nearly there'. Both are eminently portable, relatively usable on their own, pretty powerful, with ample storage, and have pretty nice looking docking solutions available.
If I had to make a choice between them at the present, I'd lean more towards the LS800, but that seems to go back and forth for me. I'm not saying that they're what I ideally have in mind, but since I can't have the implantable one, they're examples of devices that are 'getting there' in my opinion.