Not needed yet. The point of that documentary was to show audiences how the American musical was birthed and evolved from vaudeville all the way to WICKED. The art form has grown since 2004, but I'm not certain that the American musical has completed its next step on the evolution chart. Let's let history play out more so we can see what the effects of the new works over the last 10 years has had on the art form.
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle