This issue has come up before. Something the article does not mention, but which has been mentioned here, is the way Apple keeps eliminating the 'need' for Office with free iApps. Examples include the way iCal, Mail, and Address Book offer the most important features of Entourage; Quicktime competes directly with Windows Media Player; AppleWorks offers a usable alternative to Word/Excel/PowerPoint; iChat uses AIM's network instead of MSN's. If Apple supplied a free, non-MS browser with OS X then Office would not be needed outside of, well, offices.