I think the features regarding responsive images and SPECIALLY Rest API are really good news for WP globally. Because even for the users that don't even know what this is about, having the WP community leading to that direction means WP getting bigger and stronger in areas width such future projections. You can build a simple angular.js app that consumes data from a wp site and compile it in no time for native smartphone apps. I love to see WP present in the new and upcomming workflow. Go WP!