1) The document discusses using OpenAPI to describe APIs and increase productivity. It introduces OpenAPI tools like Swagger UI, Swagger Editor, and bravado-core that can generate documentation, validate requests, and convert data types.
2) An actual case study is presented on a manufacturing cloud platform called Kabuku Connect that uses the OpenAPI spec to generate API documentation, client code, and validate requests from the frontend.
3) The speaker encourages contributors to help support the new OpenAPI 3.0 specification and related tools, and invites attendees to apply for open developer roles at their company to build out projects using 3D printing and other technologies.