Ever since I watched a TED Talk, I forget which one, I have become fascinated by the possibilities of controlling things with thought and finding more about yourself.
I really want to get my hands on one the the brain reading headsets and maybe create an custom interface for my computer. It would be really cool to do even the simplest things like switching between windows. Think about terminal go to go to the last used terminal while programming, similarly switching to the code editor and webbrowser in itself would be really cool.
Mindwave looks less scary and is also a third the cost but Emotiv probably has better sensor.