What has Microsoft done with office in 10 years?

I hope you guys have used Microsoft Office 2007 and Office 97.

Do you think that there has been any significant development in terms of features?

I think that most features in the two versions are almost same. As with most Microsoft products, each new version of Office comes with a fancier and so called more user-friendly interface. As far as features are concerned, i bet you would find almost all Office 2007 features in Office 97.

The question is: What has Microsoft done in 10 years?