If talking about the latest development on technology related sector, there is actually no limit on what kind of development and improvement it has come with. There are always something new, either in the form of improvement or innovation, which comes with the same package.
All Features of Windows Server 2012 and Windows Server 2012 R2
In this matter, the same thing applies to the case of Windows Server 2012 and Windows Server 2012 R2. As the improvement of the Windows Server 2012, Windows Server 2012 R2 does come with several new things you did not find in the previous series.