I didn't watch the video so I apologize if this is a feature: I would prefer the app do auto-tagging based on voice notes, as opposed to just text that may or may not appear in a photo. If I could just snap a photo, say a few words...and have the app translate those words and use NLP to preserve the nouns as tags, that would work out wonderful.
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.
The Nikon D2X has a voice memo function, but often there is no time to do this either. I would rather see someone develop an external RFID reader (http://www.icarte.ca/) that can dump RFID data (name, title, company) read off of a name tag INTO an appropriate metadata field in the camera.
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.