First impressions: looks like Angular's two-way data binding (using custom attributes in the template itself) added to React. This should make it possible to write complex views quite fast - without writing much code, and yet we don't lose out on the component-based composition of Javascript code offered by React.

What I need time to get around to is the concept of controllers and how it works when we want to compose things together. For example, how to write a multi-select widget that exposes a clear API to the rest of the world (onChange), and encapsulates all other details within. Cx does deserve a deeper look, and I'll definitely give it a whirl some time. Also kudos for the extensive documentation you've so far written!