This would mean you could do things like:
1) Write a blog post, and then find all other blog posts that were the 'closest to yours' that was ever written.
2) Do basic "Search" in a way that's probably more powerful than even the Google Page-Rank Algo, by being able to look up every web page that exists based on a Cosine Similarity.
It's a shame Web3 didn't really ever "go viral" in a big way, or else we'd be able to do this stuff right now.