The announcement is not just about the next Office for Mac, as Microsoft today launched the new Outlook for Mac.
That said, I think that it may be better value for money to just opt for Office 365, and enroll your Mac to your subscription as, of late, it also gives you unlimited cloud storage via OneDrive. The next Office for Mac will be available for free to Office 365 subscribers, but Microsoft will also make it possible to buy 'perpetual' licenses, for those who are not yet ready to shell out for its yearly subscription. This meant delivering and continuing to improve Office on a variety phones (iPhone, Windows Phone, and Android) and tablets (iPad and Windows) brought together by the cloud (OneDrive) to help people stay better organized and get things done with greater efficiency at work, school, home and everywhere between.' However, following the release of Office 365 we made the conscious decision to prioritize mobile first and cloud first scenarios for an increasing number of people who are getting things done on-the-go more frequently. 'Historically we have released a new version of Office for Mac approximately six to eight months after Office for Windows.