Immersion is the best way to force yourself to embrace new technology, which is why I gave up Office 2010 for the last 30 days. Sadly, I'm worse off for it and I am not one of those people that complain about every little change. (Remember all your friends whining about Facebook changes when they occur?). Office 2013, as far as I can tell, has added no worthwhile features for typical business users. (I do address exceptions at the end of this article.)
When Office 2010 came out, it was only slightly better than Office 2007 but after using it for awhile, there were several small improvements (like the quick access toolbar) that became very valuable to me. Unfortunately, with Office 2013 Microsoft has focused more on their long-term strategy than providing value for users.
For example, they are working very hard to make Microsoft Skydrive an integral component of your workday so that you don't need to use Dropbox. But if now takes extra clicks to save files or you have to go into settings and change the default to avoid this "benefit." Kudos to Microsoft for thinking about long-term, but lousy execution.
And Microsoft Outlook 2013 is truly the worst part of the Office 2013 upgrade. (Click the image for a larger view.)