BCI (Brain-Computer Interface) technology is real and being used in gaming, prosthetic limbs, wheelchairs, etc... in the future it will allow you to control all of the smart devices in your home, at work, etc.
The rapid advancement in sensor technology is making it easier and easier to read brain waves every year. The brain sends a signal just like a computer, so it can be intercepted and deciphered.
Further in the future, we will be able to download skills, languages, anything into our minds. A brain is a computer, just a different language.