• New .NET Windows Management Interface (WMI) that allows for IIS configuration from PowerShell scripts or custom .NET Framework applications
• Request Tracing features to improve diagnostics which reduce the time to analyse any issues through premier support
• Improved availability through immediate configuration changes without requiring site downtime
• Modular Architecture where only those modules required by the applications are actually present which reduces maintenance complexity
• Create custom views of logged events to automatically filter events (by source, severity, and more) to speed up troubleshooting
• Advanced virtualization technology for hosting multiple logical platforms under a single, minimally-configured server.  SharePoint is supported under Hyper-V virtualisation technology.
• Consolidated environment, specifically for development and testing of multi-server SharePoint farms
• Reduce resource costs by reducing the number of physical servers required for development
• Minimizing the deployment footprint by tailoring roles, services and features installed. This reduces the attack surface
• New Windows Firewall, increasing individual server security
  New Security Configuration Wizard (2.0) that enables role- and feature-based security hardening, simplified from earlier versions
• Enhanced Group Policy Management by using wizards to simplify the creation and maintenance of group policies
• Customized configuration by using required roles and features reduces overall footprint and makes sure that nonessential services and processes are not present. This guarantees that resources are dedicated exclusively to required services
• Improved performance for high-latency networks
• Improved performance almost to level of unprotected traffic
• New console for monitoring performance and reliability both in real time and historically
• Set thresholds for performance metrics that result in custom actions (for example, alerts)
• Stability index correlates significant system events with server reliability as an help in troubleshooting problems that evolve over time

Thanks for MCS for providing above information