This looks nice. I like the idea of more-or-less seamless integration between a1 and a2 on the same page, to allow for incrementally experimenting with a2 featu

This looks nice. I like the idea of more-or-less seamless integration between a1 and a2 on the same page, to allow for incrementally experimenting with a2 features without having to port the entire application over. With angular 2 moving to a virtualdom implementation we can get serverside rendering and some real speed improvements (if you move your virtualdom stuff to a web worker for example). This is rad.