Im not sure if this was posted before but a friend and me just stumbeled upon some interesting videos where scientist read video clips out of peoples brains.
Since Braingate and similar products are already out there on the consumer market to buy for your home PC this developement isnt just so far behind.
But take a look for yourself.

http://www.youtube.com/watch?v=MElU0UW0V3Q...feature=related
http://www.youtube.com/watch?v=nsjDnYxJ0bo
http://www.youtube.com/watch?v=KMA23JJ1M1o