I'm playing with Canvas, the new visual page builder for Drupal, the first version of which came out in December. There should be an article on the topic soon, maybe even a video — haven't decided yet.
For now, in short:
— it's fun;
— the value of component-based markup / SDC / storybooks and all that stuff has gone up;
— integration with the rest of Dru's infrastructure is low so far;
— there are a few bugs, of course.