If you are an experienced Java developer, reactive programming will give you a new way to approach scalability and concurrency in your backend systems, without forcing you to switch programming languages.
Well, Not so interesting as I thought it will be. Just a small description of each possible method that will newbies use with a rare examples of code. Although It was interesting to check my current app under development with StrictMode because I use Realm with RxJava: everything is fine :)