I see a ton of discussion about the NodeJS decision and almost nothing about the more interesting industry paradigm shift to reactive programming and using functional-style programming in an imperative language.
They're joining the likes of Facebook, Netflix, Square, Microsoft, Instagram, Khan Academy, SoundCloud, Trello, New York Times, and others in adopting reactive extensions.
They are also moving to a Flux-inspired application structure which is supposedly very similar to functional reactive programming, which is what the OP was referencing.
What exactly do you mean by reactive here? As one of the other posters said, react's 're-render the virtual dom' concept doesn't have any direct relationship with the reactive manifesto, though flux might be a better candidate.
They're joining the likes of Facebook, Netflix, Square, Microsoft, Instagram, Khan Academy, SoundCloud, Trello, New York Times, and others in adopting reactive extensions.