This sounds like a way to control A robotic arm. Rather than something like,”raise shoulder to 45°, rotate arm 10°, flex elbow 45°, turn hand 90°, open hand”, you would simply think, “ Put hand there “.
It doesn’t really matter if the arm is attached to you or not.
Andy Griffith did a television series about that sort of thing in 1979. It was called Salvage One and it looked a little like what SpaceX is currently doing.