A few people have commented on a "new" feature in Revit 2010, called Key Tips. They display when you press the ALT key on the keyboard. They make it possible to use the keyboard to access Ribbon tabs and panel items while working feverishly.
While they are displayed differently are they really "new"? Windows has always supported this technique to access menu items. The premise for them was, "what if your mouse stopped working or worse, you don't have a mouse?". These gave us a way to save and gracefully get out of an application without a pointing device. Literally a hold over from DOS pre-mouse computing.
Yes Key Tips are a good thing...but "new"? What is the saying? "Everything old is new again"?