Siri Shortcuts are going to be built into iOS 13, rather than downloaded as a separate app, and the new version of the app is going to be considerably better at getting new users up and running with shortcuts. Suggested automations will be offered to help users get started at building shortcuts for commonly identified actions.
Siri is also getting some significant voice improvements. Using a new feature known as Neural TTS, Siri’s new voice is going to be entirely generated by software, rather than by piecing together word fragments, resulting in a much smoother and more natural cadence. This will especially be noticeable with longer sentences.