I'd love to see a more compelling example / demo. The demo page you have is fairly short and the content being searched seems semantically very narrow (it's all text about word embeddings!). As someone who hasn't spent any time trying out similar systems or trying to build something like this, it's difficult for me to come up with queries to actually judge how well this is working, given the small content in the demo page. So overall, that makes the actual demo not very compelling for me. I'm left uncertain how effective it might be for a more realistic use-case.
Basically if you had a better demo - larger and more varied example content, and a few example queries to show off what this can do - then I think the whole thing would be more immediately interesting (to me).