Why? Sorry, but your comment is not very insightful without more explanation, and the rest of your comment is just an advertisement for your (admittedly impressive looking) work.
Because (A) it allows similarity search between auxiliary objects, not just equidimensional vectors, and (B) can be implemented in a similarly short fashion, while providing great performance.
Why? Sorry, but your comment is not very insightful without more explanation, and the rest of your comment is just an advertisement for your (admittedly impressive looking) work.