I'm interested in what his definition of 'working' is. It could be anything from moving a large block cursor around on the screen to controlling a RC car, though I am better it's closer to the cursor movement end. It also could be a brain imaging display and a neuralink device on a person and you see it pick up neurons firing - which is something medical technology has had for a while, though not in a portable form. Either way, it's a fascinating line of research and I'm glad he is putting money into it.