React is a library, not a framework. What's your router? What's your model? What's your buildchain, how do you deploy, how do you do ajax requests, etc etc etc?

Facetious comments like this help nobody. There's not a site in the world "just" using react + webpack. And I say this as someone who works with a react and webpack site.. oh and backbone, and gulp, and rsvp, and requirejs, and another 70 lines in package.json.

Does the React + Webpack stack essentially give you all of the same functionality that Angular does?

How about...no...? React isn't the solution to every problem.

No. It's Clojurescript and Om you should be using.