You see them increasingly in the streets: Borgs. Fiendish creatures, eternal opponents of Captain Kirk in the Star Trek series. Borgs can be recognized because they are part human, part machinery. Bluetooth headsets sticking out of their ears, if you're unlucky with a boom mike along the jawline.
If you think that's the worst of it, try the WristPC Keyboard. PDA in your eVest pocket, LCD projection glasses on your nose, and a keyboard on your sleeve. Don't forget your solar-powered backpack, or you'll drop dead before you reach a power outlet.