This designer used a process similar to the one detailed in the Art of Innovation by Tom Kelly - a book that provides a fascinating and informative glimpse into the innovation process. I highly recommend that book, and I think lots of hackers would both identify with the material and learn new ways of generating both the intuitive and counter-intuitive insights they need to design a superior user experience.
Cool concept. Not sure if the proficiency setting requires a physical switch – it seems like a user would only change that setting a couple times over the course of their usage of the camera.