It's a truism that users of office productivity suites use 20% or even less of the available features. This doesn't just apply to Microsoft Office, either. It applies across the board, to Open Office, Star Office and all others, as well.
Microsoft realizes this and is (finally?) taking steps to get users more informed about what is available to them. Don't worry. Clippy is still dead. Instead, they're taking the approach of minimizing the interface options and directing users to whichever features they might wish to use.
If they can succeed in this, it will definitely change the way people work.