This talk is a code walkthrough, implementing a date picker to showcase the power of ember-changeset and contextual components. Given at the Ember Boston Community meetup.
Ember-changeset is an addon that provides an abstraction over Ember models such that only valid data will ever be set in a model.
Contextual components are a set of conventions that allow a developer to build a component that can be customized by its consuming application. This means they can both yield values to its consumer, and allows a consumer to customize the display of the component.