Well for starters you would have to read the signals from the brain, otherwise you are limited to the nerves in your hands. Maybe I wasn't clear enough about what I mean. I was thinking along the lines of thought control, not that you would control a virtual hand, if you will, on the computer. And if you wanted that you would, like I said, have to capture brain activity and develop software that would be able to make sense of your thoughts and translate those thoughts into actions on the computer ... this, to me, is a whole different game.