Microsoft Office Backstage View provides a first-class surface for a wealth of document information and operations that had been obscured by levels of user interface. In Office 2007, to find out about the license state of your Office product, you would visit resources that click the About button to bring up information, buried several levels deep. With Office 2010, we set out to evolve the Resource Tab of the Office Options dialog into a dashboard-like interface: a dynamic, data-driven view that consolidates and surfaces application- and product-specific information such as versioning, updates, and license state in one convenient location. The Resources tab with its matter-of-fact presentation is enhanced in order to: Bring product support features, product licensing information, and various tools into one location; Align with the WYSIWYG UI paradigm; Provide value that gives you a reason to return to this place.
More info: Office 2010 blog