This sounds straight like future-future-tech. My Fitbit can't even measure my heartbeat or steps with sufficient precision and they want to measure electric signals from neurons? Sounds (yet) impossible.
It's not even that new. A professor was using a much earlier version of this same tech to steer his boat in the 90's. It was very easy to read left and right signals to control a rudder as a prototype.
There have been commercialized versions of this tech already. The Myo was Kickstarted in 2015 and then acquired by CTRL-Labs. I have one and that generation of the tech was still tricky to use effectively.
