There's more info on future plans here: https://angularjs.blogspot.com.au/2016/09/angular2-final.htm...

Specifically:

  > Bug fixes and non-breaking features for APIs marked as stable
  > More guides and live examples specific to your use cases
  > More work on animations
  > Angular Material 2
  > Moving WebWorkers out of experimental
  > More features and more languages for Angular Universal
  > Even more speed and payload size improvements

And immediately:

  > Semantic Versioning