I think there are plenty of cool things that could be done with an app. For example, a tile that shows the latest headline. Perhaps the ability to pin specific forum threads to the start screen that update with new posts. Also, integrating the app with the share charm.
you could also integrate the app with Search to make it easier to find past articles, or to find WPCentral articles if you are on another website or app and see something that makes you want to look at a specific article or thread here.