Do we really need another HTML5 authoring app?

Yesterday Google released the beta version of its newest project: Web Designer.Announced earlier this year, Web Designer is a visual tool for building HTML5 adverts; although one suspects Google’s ambitions for the application are much wider, given that it’s not named ‘Google Ad Builder’.Web Designer is, at first glance, a promising piece of software, but I question whether we really need yet another tool for building HTML5 content.