Firstly, awesome work! Already using this in our React Router v4 app.
I was curious what was behind the `flushServerSideRequires` code? Was this simply a pseudo-code like statement or is there any real progress on the implementation? I ask because with this and https://github.com/thejameskyle/react-loadable/pull/14 we would have a nice client-server SSR implementation without the mismatch issues.