This is a concept I had for a new type of camera pixel. The photons are coming in through an aperture and hitting a structure that scatters the light based upon wavelength (like a prism). The light then hits the walls which are lined with photon detectors. The location of the activated detector indicates the frequency of the photon
This type of camera would probably be able to see massive glaring differences where our eyes and current cameras see no change at all. The potential for all forms of imaging is pretty big here. Forensics, Medical Imaging, amateur photography (cell phones), machine learning, and so much more.