Well it's there in the name, they add machine learning to Postgres. They are not the only ones doing this, I am working on a similar idea and I don't think all of us are as misguided as the crypto bros of 2022. This is as much about Postgres as it is about AI. No one has yet successfully communicated what those in the know are seeing, and it is sort of hard to explain but relational databases are a good match for AI. Personally my strategy is to try to build compelling application instead of an infrastructure play, but to each its own and I wish them the best.