It's all just rubbish. If it worked amputees would be controlling artificial limbs, which they are not. Even with real sensors this sort of thing is neigh on impossible. With Micky mouse sensors it is all one big joke.
We are not exploring the final frontier with star trek enterprise yet but we ARE using tablets already. Given the fact human motor control is electric in nature, this will eventually be worked out. I agree with you mostly but maybe not all of these is rubbish. Maybe there are genuine researchers that do believe this can be done in the near future.