Just gonna put there here cos this is too amazing to not be seen:
http://www.engadget.com/2013/01/10/crapgadget-ces-round-two-necomimi-brainwave-cat-ears-video/
They're brain-wave sensing car ears... attach them to your hear & they pick up your brain-wave activity and twitch/rotate depending on how focussed/relaxed you are. Too freaking cool. And no, I don't think I could wear them in public LOL