Agreed about the utility of documents. But that's not the issue. The issue is contorting a document to make it into an application. Mobile app devs don't have to deal with this and the benefits are many. Let documents be documents and apps be apps. I'd like to see a webgl based app toolkit that works like a mobile app toolkit and performs as well as a mobile app. I don't think it will happen though because so many devs have now been raised on html, css and js. They like it.