Driven by the hideous amounts of money sloshing around the computer gaming industry, brain researchers are developing controllers that read brain waves:
Controlling things by mere thought is a staple of science fiction. That fiction, though, is often based on a real technique known as electroencephalography (EEG). This works by deploying an array of electrodes over a person's scalp and recording surface manifestations of the electrical activity going on under his skull. [More]The idea of replacing joysticks with a plastic helmet is one thing. Ponder what it might be like if we climb into our combines and slap a beanie on and take off.
What happens when you start daydreaming about playing golf? Or eating cheeseburgers? Or Betty Crocker in a cheerleader outfit?