Quite an impressive list of new stuff in the Hyper-V are with 2016 release, and then you of course also have the new stuff in Clustering and storage to add to this but that will be another blog post 🙂

• Compatible with Connected Standby (new)
• Discrete device assignment (new)
• Host resource protection (new)
• Hot add and remove for network adapters and memory (new)
• Hyper-V Manager improvements (updated)
• Integration services delivered through Windows Update (updated).
• Linux Secure Boot (new)
• More memory and processors for generation 2 virtual machines and Hyper-V hosts (updated)
• Nested virtualization (new)
• Networking features (new)
• Production checkpoints (new)
• Rolling Hyper-V Cluster upgrade (new)
• Shared virtual hard disks (updated)
• Shielded virtual machines (new)
• Start order priority for clustered virtual machines (new)
• Storage quality of service (QoS) (updated)
• Virtual machine configuration file format (updated)
• Virtual machine configuration version (updated).
• Windows Containers (new)
• Windows PowerShell Direct (new)

Read more at the technet site here.