Kind of, but SA Pro is still limited in the type of functionality the contents can contain.
The idea would be to eventually get it to add more functionality in a future version. Currently contents are really content placeholders and don't have functionality. It is more of a place to quickly prototype and create a site with functioning links and pages so you can fill in the actual content and functionality in DW without having to maintain links and create all of the pages to see them in context.
Eventually having SiteAssist manage an entire functioning application is definitely the concept behind SiteAssist and the direction it is going. Currently it does that well for a html site, but doesn't add any database or server side functionality necessary to complete the application.
