A Japanese company called Neurowear conceived brain controlled cat ears for you to wear. The Necomimi ears scan your brainwaves and move depending on your state of mind. If you are concentrated the ears stand up. I fyou are relaxed the ears lie down. The ears move actively if you manage to concentrate and relax at the same time.
When I first saw the cat ears on the photo, I thought they let you hear like a cat. The girl in the video below wears the Necomimi ears with dignity. I believe that I cannot pull that off. In the second video below you see kids and other people try out the ears at some event. There you also see that the ears have a big circuit unit attached to it that the girl in the promo video has hidden under her long hair. It is not clear how far away Necomimi is away from hitting store shelves in Akihabara.