Researchers based at Zhejiang University in China have produced a system for controlling a quad-rotor unmanned aerial vehicle with the mind. Dubbed "Flying Buddy 2", the system uses a standard, commercially-available Electroencephalogram (EEG) headset, a computer and a Parrot AR Drone. The computer processes the data received from the EEG and converts it into control commands which are beamed to the drone via a Wi-Fi connection. Judging by the video, the latency of the setup appears to be relatively low.
Controlling an airborne vehicle with the mind requires that one first learn some commands. For example, in order to make the drone take off or land, the user must think left hard, while rotating can be achieved by thinking left lightly - the drone was also configured to take pictures if the user blinked. This all sounds rather demanding, but like other mind-control systems we've seen such as the EEG-controlled wheelchair-mounted robotic arm, mastering the controls no doubt becomes much easier with practice.