With the addition of the new Observe API, React becomes truly reactive! This fresh feature allows components to subscribe to observable data sources, and respond automatically as data is fetched or updated. The talk will cover when and how to use the new API in your own applications, and discuss how it stands to change the way we build and organize React components. We'll also detail how Parse implemented the first data source designed to interact with this API, and the lessons we learned along the way. Finally, we'll explore some unique use cases for observable data to inspire your own projects.