I don't think it's patentable[1]. It's a cute idea, kind of obvious; I'm not sure how well it really generalizes on all the cases that come up in huge datasets. If you continue along this path, you might come up with some patentable detail. I think in the US, you can file up to a year after inventing, so public demos don't destroy novelty (IANAUSAPA).
I think your strength is less the technology than the interface, which is nicely wrapped up and works[2].
You'll get interesting user leads from this demo. Maybe: who is suffering from what problem in what specific context who really needs your help. It's hard to get this market research any other way,
I can't see a really neat or natural way to monetize it - it's just not big enough. But the world's imagination is greater than my imagination. If you stick at it, I think something will come to you. That would be really cool!
[1] a patent isn't for suing people, but to have something to sell to Microsoft or Google etc.
[2] of course, you can improve the GUI further once you know what people need - imperfection is a good thing, because a head start on the competition is worthless when you run out of track.