#3 – Remote Desktop Services – Microsoft added support for OpenGL and OpenCL applications and added multi-point services as a new role in Window Server
#4 – Storage Services – This services now enables you to create storage QoS [Quality of Services] policies on a scale-out file server and assign them to one or virtual disks on Hyper-V virtual machines.
#5 – Functionality of Failover Clustering – Now a Hyper-V or Scale-out File Server failover cluster can easily be upgraded without any downtime or needing to build a new cluster with nodes that are running Windows Server Technical Preview.
#6 – IIS -The latest version of Web Application Proxy focuses on new features that enable publishing and pre-authentication for more applications and improved user experience.
#7 – PowerShell 5.0 – Windows added new features that include support for developing with classes, and new security features that extend its use, improve its usability and allow you to control and manage Windows based environments more easily.
#8 – Hyper-V – Rolling Hyper-V cluster upgrade. This is a huge feature that customers have been asking for. It allows a Windows Server 2012 R2 cluster to be upgraded one node at a time in a mixed-mode configuration.