My reply is usually the same: React.js, Ember and so on, they’re all a blip in the history of the web. They won’t be here in 10 years. Something else will be. I’m not too interested on these talks because they’re tied to a point in time, and I’m interested in what lasts. In my head, it’s akin to fashion vs style.
I’d also like to know more about React and why it receives so much attention, so I’m glad someone of Remy’s stature has asked this question. I’m hoping that there’ll be some good follow-up posts and discussions.