One example that's fun is being able to bring in the data to e.g. Excel - here's an example of a proof of concept we did to give an idea of what's possible with GraphQL https://youtu.be/IHPaDvXQWyA

Building that kind of tooling ad-hoc is going to be so difficult. I suspect that GraphQL is just in the early days of building this tooling, and everyone will be able to re-use it without additional work on their own part.

(it's also in the linked talk at 33m22)