New Features of Windows Server 2012

The latest version of Microsoft Windows Server, Windows Server 2012, offers many new enhanced features and functionalities over its predecessor, like new server virtualization abilities, new Server management features, Hyper-V 3.0 and IIS 8.0. The new features of Windows Server 2012 makes it the best server virtualization software by Microsoft yet.

Source - VPS Servers - New Features of Windows Server 2012

Share-nothing live migration is the best feature it means, is a mixture of SMB3 live migration & storage live migration. Basically you move an image between hosts with just an Ethernet cable attached.