Lots of researchers are involved in developing some kind of a brain-machine interface (for example the US Air Force has developed a helmet that allows the pilot to control many aspects of an aircraft just through thoughts) but the technology is slowly becoming more mature and commercial applications may be just around the corner.
Hitachi has now developed a brain-machine interface that allows you to control a toy train. Of course, one of the main applications further development of this will lead to is replacing the remote control
"Forget the clicker: A new technology in Japan could let you control electronic devices without lifting a finger simply by reading brain activity.
The "brain-machine interface" developed by Hitachi Inc. analyzes slight changes in the brain's blood flow and translates brain motion into electric signals.
A cap connects by optical fibers to a mapping device, which links, in turn, to a toy train set via a control computer and motor during one recent demonstration at Hitachi's Advanced Research Laboratory in Hatoyama, just outside Tokyo."
"The technology could one day replace remote controls and keyboards and perhaps help disabled people operate electric wheelchairs, beds or artificial limbs.
Initial uses would be helping people with paralyzing diseases communicate even after they have lost all control of their muscles."