Congratulations, you just learned how to build a HTTP endpoint with Vert.x and see a bit of the power provided by Vert.x. Obviously, there is a lot more to come: REST API, database access, testing, messaging.... So, stay tuned!
If you want to improve this tutorial, submit a PR to https://github.com/cescoffier/techio-playground-http-api-with-vertx. This repository also contains the whole code shown in this tutorial.