I love cameras that don’t give you a picture of what you are looking at but instead produce a derivative. This camera performs an image search and shows you the closest match to what you are shooting.

http://petapixel.com/2016/05/19/diy-camera-finds-similar-photo-online-every-time-take-picture/

This is similar to this camera that would refuse to take an unoriginal picture, or this camera that would print a text description.