For example, I wish to write a component that displays the weather for a given date and zip code. I also want to create another component that displays the local events for a given date and zip code.
I want a simple SPA app to include these two components along with a shared chooser component that allows users to select the zip code and date.
Finally, I want to share the weather and event components with other developers so they can incorporate them easily in their own React/Redux based applications.
By decoupling the selection of state from the actual state structure (using relative selectors) + defining a public interface for your features (your app will basically consist of smaller apps - fractally) you can achieve what you're after.
[0] http://jaysoo.ca/2016/02/28/organizing-redux-application/