One thing I don't understand, and I should have thought of this long ago. Why on earth is this a hardware solution at all? Any reasonable PC/Mac/Linux box should provide any or all of the capabilities of your little board.
There seems to be nothing here that software can't address - OpenCV or libraries in Apache commons that can pull photo EXIF data. I even wrote a few Java programs to test how easy it is to do facial recognition or geo-tagging.
No, I'm not here just to be a spoiler, I backed your project, but I sincerely believe you released it way too soon; that aside, this is an honest question. For someone who hasn't bought one yet what will your board provide that a software picture sorter can not?