I would personally say that PWAs support for Ionic and discussing this topic in this last chapter is the best approach to wrap up our exciting journey. You have already understood now the power of a PWA, and which you can extend to your normal web applications also. Also, we can't say here that PWA will replace native applications as there are low-level APIs that you only have while you are building your application with Cordova and using Cordova plugins.
From recent blog posts from the Ionic team, it looks like we will be having desktop support with electron coming really soon. I would recommend every user or developer to the subscribe to Ionic blog, which is the best way to be up to date about what's going on with Ionic. I have tried my very best to make sure that the content of every chapter is up to date, but you can see how actively the project is growing, so make sure that you put the effort...