What you see here is every still frame of the famous 1939 film The Wizard of Oz compressed into a single frame, creating a colorful "barcode" for the movie. moviebarcode is a neat blog that publishes these images for a wide range of famous movies.
Barcodes can be found everywhere, but using existing barcode systems with ordinary cameras require that the barodes be printed large or that the camera be placed close to the code. MIT's Bokode project is a new system that magically stuffs barcodes into bokeh, allowing ordinary cameras to be used as barcode readers from a distance. The codes are contained in little points of light that only turn into codes when viewed through an out-of-focus camera lens. You've probably seen how little bright points of light grow into larger and fainter points of light when you defocus.
Yesterday, Canon announced a rather strange and unexciting Canon 7D "upgrade." It's not exactly an upgrade either -- all of the camera specs for the new Canon 7D Studio Version are unchanged. For $1829 for the body only ($130 more than the current 7D), photographers can have several "locked levels" of the camera. Pay even more and you get a barcode scanning kit and a wireless transfer unit, the WFT-E5A.
So essentially, an extra $900 on top of the regular 7D price lets you have the camera equivalent of parental controls, plus barcode scanning that embeds information into the EXIF data in photos.
Sure, there's a (somewhat niche) practical application for these features. The locked levels can allow for quick settings that can't be changed without a password -- perfect for head photographers to who send mindless drones out to shoot or have little faith in their assistants.