It is real and the technology exists. I have had past PERSONAL experience with computer control via neural feedback.
--side story to explain: I have ADD and aspergers. When I was about 8 (I think) I saw for some time a particular specialist and one of the activities I did was to be hooked up (with electrodes on my head) to a computer and navigate a 2D map with a little dot.
Not quite the level of control that you'd need however I can tell you with practice it gets easier.
This is amazing stuff. I'm so getting one.