The stand out items for me is that support has been dropped for several older versions of Windows, SQL Server and Office:
Windows XP all editions
Windows Vista all editions
Windows Server 2003 all editions
2008 all editions (including R2)
The only surprise on the above list is that some of the software listed as no longer supported was also listed as no longer supported with Dynamics GP 2013; in fact only SQL Server 2008 is new to the list.
Apart from the above retired software, the recommendations look pretty much the same as Dynamics GP 2013; Windows 8.1 and SQL Server 2014 have been added as supported.