Don't forget the glasses that are used as computers. chough chough google cough.
Am I the only one who is scared of the "brainwave activity sensors". Microsoft isn't exatly known for its concern about the users' privacy, nor are they known for security. As Bruce Wayne once said: "If you can introduce images into the mind, what stops you from extracting images out of the mind?" The last thing we need is to give anyone even more power to spy on us.