You say that as if we ought to present an alternative to jQuery and PHP, but they are perfectly good tools for what they do. You wouldn't want to use React for a simple informational website and neither should you want to.
I would like to see a backend framework similar to Laravel (/Rails/Django). I'm not quite sure why there isn't one in JS but it would be a big productivity boost. 90% of PHP development will be either Laravel/Symphony, Wordpress or Drupal.