Mind control of devices

It sounds like science fiction, but the ability to control devices directly through thought is not unreasonable.  Crude interfaces have been in labs for years.  The basic idea is to record brain waves when a subject thinks certain actions such as moving a finger.  Recognizing those signals can be used as control.  One challenge is that it is relatively easy to train for an individual, but has proven difficult to standardize.  Here is an article about recent advances: http://spectrum.ieee.org/