In that time, Google has become a major player, with its suite of online tools, and even Apple has made inroads with its iWork office suite, though admittedly within a smaller set of computer users. The world has changed plenty since Microsoft introduced Office 2007.
Users looking for bare-bones, dead-simple office software should stick with Google's and other online offerings or continue using older Office versions they have already mastered.
The bottom line: Microsoft Office 2010 is a worthy upgrade for businesses and individual users who need professional-level productivity apps, but it will take some time to get acclimated with the reworked interface.