This looks really nice! I learned Scala primarily to use the Play Framework which is a fabulous way to build large web applications. This looks spiritually quite similar, but with the advantages of Rust.
Funny, I'm learning Scala for work after teaching myself Rust. It's definitely made the whole process a lot more straightforward thanks to the commonalities between them.
[1]: http://akka.io/ Akka is the implementation of the Actor Model on the JVM.