First and foremost, ftom the UI side this is just SharePoint 2007 trying to look more like Facebook or Flickr. The UI now uses a number of new AJAX and other Web 2.0 interfaces. So if you are a old hand at SharePoint 2007 there is very little to learn. For a new users it might be a bit easier to learn.
Beyond the interface there is not much new to SharePoint 2010 UI. The have added more records management features up front like holds and locations. But overall working with the logic and limits of SharePoint list is just as frustrating as ever. Most features seem to be the same.
But the new UI will make selling this to your CIO or business much easier. It gives you a lot more good Web 2.0 UI and Web 2.0 like eBay, Google Docs, MySpace, and Flickr. The new ribbon control makes it much easier to find the SharePoint features. I always hated the fact that service features in 2007 seem almost randomly arrayed in the menu items.