I bet you wish they made a thought controlled dildo that you could shove up your ass without even moving, because everything takes too much fucking effort for you.
So where exactly was the arm located? Since the monkey still had it's own two. Did it just sit on the ground infront of the monkey or did they attach the arm to it?
They've had completely implanted (completely inside the skull) cursor control implants that reported work pretty good for months now. Note, however, that this experiment was probably performed open-brained.