I have seen many (and I mean MANY) exciting projects come and go, but I do believe that IOU is here to stay because there are no "obvious" flows to the whole thing, you might as well call it "perfect"
I saw several projects with a similar algorithm too. But same it is even good. All of them supplement each other and I think IOU too it will appear in this list.
Maybe we will encounter similar projects in the market but each and every one of this project has its own style and components for the success. They are very active in making each project unique from one another this will be a form of features and additional ideas. Anything that will make them different each other.