Traditionally, documentaries have been small business. But will Michael Moore’s success at the Oscars, turn things around? According to one theory, “the studios are making more and more popcorn, merchandisable films – package films with no core. But there’s an audience who want to see movies about the real world who only get the opportunity to do that when they see documentaries. In theory, then, this ought to be a golden moment for documentary makers in the US.”