The preview is currently aimed at IT professionals and developers, and as such it requires an active Office 365 subscription. This is a minor update with some small new features and a visual refresh. Office 2013 is fresher than Office 2011 was, and so it's not altogether surprising that Office 2016 is to Office 2013 much the same as what Office 2013 was to Office 2010. In fairness, Windows isn't in such desperate need for an updated Office. Hot on the heels of Office 2016 for Mac, Microsoft today released a preview of Office 2016 for the operating system that it actually earns money from.
