This doesn’t seem particularly remarkable. The generation of “phosphenes” isn’t new, right? So it should hardly be notable that someone should be able to make a choice to move forward or down based on whether one was generated.
This seems right down there with the “thought-controlled nanobots” and “direct brain-to-brain communication”. Or even slightly reminiscent of the Atari Mindlink, which allowed game control via the waggling of one’s eyebrows.
