Playing Pong without a joystick ...

[Angel Eyes]

... via a microchip in one's brain:

https://www.youtube.com/watch?v=rsCul1sp4hQ

Technically impressive.   Implementing something similar in humans raises all sorts of ethical issues, obviously.   

I could see such implants improving the responsiveness of pilots in combat, perhaps tank crews as well.  Whether the personnel would be willing to be implanted is another matter.