We recently noted that Neurosky, a maker of lightweight EEG devices, is working with Sega to create mind-controlled video games. At the time of the announcement the companies did not provide any hints at what the gameplay will feel like. A couple videos below, including one from an ABC affiliate, show how the Neurosky controller can potentially be used to manipulate objects within a video game.
Flashbacks: Coming Up: EEG Joystick; New Gaming Input Device Reads Your Mind; Mind Games