There aren't expected to be any changes between versions, and the Windows app will launch with the new "colorful" theme known to mobile users and it will be touch-optimized, of course.
Additionally, Microsoft has improved search, attachments and email performance within Outlook 2016 and Word 2016 will get real-time co-authoring just like its web app counterparts.
Microsoft has not confirmed the date, but with developers testing the final release candidate as we speak, it is a good guess if anything.
Source:
Verge
Written by: Andre Yoskowitz @ 26 Aug 2015 19:45
