Stuff like this is in it's very early infancy. 100 years from now and we'll all have onboard computers. It'll happen.
bit about a sci fi book done Peter f. Hamilton
---------Neural nanonics
A set of Neural Nanonics is a computer network which is implanted within the Human brain. The user controls his or her nanonics directly by just thinking about it. Nanonics can be used for a very wide variety of applications. New skills and knowledge can simply be downloaded into the nanonics, becoming instantly available to the user though generally without the finesse or experties to somone who comes by the skill or knowledge naturally. Messages can be sent to other users in a process analogous to using present day email or instant messenger programs (datavising), giving a form of technological telepathy. They can allow the user to control pain and regulate bodily functions. Unarmed combat programs can take control of the user's body, calculating and even implementing the optimum attacking and defensive moves. Other programs allow direct interface with external hardware from personal weapons through to spacecraft.-----------------
I wouldn't even say that it's far fetched. Computers are getting more and more powerful, and smaller and smaller. Anyone doubt that in a hundred years time we'll be able to contain my entire computers processing power to the size of a pinhead? We've only been dabbling with computers for a generation or two, imagine what a hundred years will do.