Brain-Computer Interfaces: We're Getting There
Simple man-machine interfaces are already here: If you want to play Pong, you're all set, Skippy. If you want to send an email to someone by just thinking about it, you're going to have to wait. The good news is that NASA is currently working on the latter approach. Using sensors attached to the Adam's apple, they've been able to capture subvocal (e.g. silent) speech. In other words, if you're reading this without moving your lips, the system can pick that up, send it to a computer, and use it to issue commands to say, the Mars rover, or control a drone from somewhere noisy or quiet, where you can't or don't want to be heard, like a rock concert or a library, meaning you are both silent and deadly.