There are features like auto tagging based on texts in photo and organization in lists.
What features would you like to find in such photo note application?
http://app.nowte.com
The great benefit of Nowte also is also simple sharing options.
Anyway - thanks for your feedback!
Everyones who applies now, will get the early access to the app once it will be released later this year.
As long as you're deriving characteristics, color definitely should be a default option...if a large central object is predominantly something like blue, then have "blue" be part of the auto-created set. Sometimes I might remember a photo as having a lot of "blue" in it, taken during a given time period.
But to answer your overall question, this app can definitely find an audience. Good luck!
Also, preserving geocoding data would be a useful option, and obviously something already built into camera feature.