Yeah, someone is going to build this. We considered quizzing the user on the topic instead of chatgpt for our demo. It's a lot of fun to test your knowledge on any topic, but it was a worse demo because it was way less related to our current product.
I think that one of the obvious next big spaces for LLMs is education. I already find chatgpt useful when learning myself. That being said, I'm terrified of trying to sell things to schools.
If you ever need to pivot, it seems like this would do reasonably well in the education space also.