Well i dont kniw how much any of you keep up with robotics and bio nedical engineering but recently there has been an “exo suit” created that take brain signals from the spinal cord and interprets them as motion for the device. Its been tested on human and does work but it does cost quite a bit. As far as motion sensing we do have the technology but i still cant begin to understand how to go around the visualization technology without hurting the brain with electrical inputs.