Control electronics using brain waves!
It is still a cumbersome process that involves activating your brain in a way that has very little to do with what you really want. The device monitors activity in the frontal cortex (like calculations) to activate. So it really seems like an on-off switch and to turn it on you have to do something moderately brain-intensive and boring. So you can run the train, but you won't have fun doing it!
It won't be long before people can train a 'brain reading' device like people train voice-to-text speech interpreters.