Title says it all. We got a more detailed look at Office on the new version of Windows Phone. We knew about Skydrive expansion, better support, Office 365 integration and now we see it in action.
What's also nice, though not seen, is if you need an app e.g. Adobe for PDFs, the OS can now recognize file types and match them against supporting apps in the Marketplace, making the process of finding the right app to "handle' the task much more simple.