Hyper-V is an integral part of Windows Server and provides a foundational virtualization platform that enables you to transition to the cloud. With Windows Server 2008 R2 you get a compelling solution for core virtualization scenarios – production server consolidation, dynamic datacenter, business continuity, VDI and test & development.
Hyper-V provides you better flexibility with features like live migration and cluster shared volumes for storage flexibility.
Windows Server 2008 R2 Hyper-V Home Page
Learn about VMWare to Hyper-V Migrations
Learn about Microsoft Private Cloud Deployments