I would like to extend the scope of the article. Instead of only showing how to use angular why not extend it to js frameworks.
I made a mithril example without the drupal code at http://embed.plnkr.co/pOvB7Zn3tH73O84R90L2/preview.
The learning curve for mithril is less steep than angulars, which makes it easier to learn in a multi programming language environment like drupal.
There is no template content because everything is javascript. It might seem strange to some but as I see it it’s not that different from using jade as a template language.