The SharePoint Fluent User Interface
The context sensitive ribbon interface is now integrated into the SharePoint 2010 user experience. Your applications can extend the ribbon interface to include new menu items and options both on a global level and based on the context of the user. The user interface now also features a status bar immediately below the ribbon to indicate the status of the page that you are working on. Not only do you have context for where you are on the page by context sensitive menus but the overall settings, status, or errors on the page have a consistent location to be displayed.