Both Smart Components and Presentation Components receive data from Services in entirely different ways. Smart Components use constructor injection to lookup the entire service from the injector while Angular 2 Presentation components take the data from @Input defined on their component class.
In the app, HomeComponent is smart component, it talks to the service and handle events.
Dump Component likes WidgetOneComponent, it receive input and just displaying the data.
[Angular 2] Angular 2 Smart Components vs Presentation Components
原文：http://www.cnblogs.com/Answer1215/p/5890026.html