With Windows Server 2012, Hyper-V brings improved virtual machine scalability and performance, network virtualization with quality of service, NIC teaming, disaster recovery with Hyper-V Replica, shared-nothing live migration (such as between non-clustered systems with only local storage), VM failover prioritization, and live storage migration.

Check out this latest article from Information Week: http://www.informationweek.com/storage/disaster-recovery/microsoft-hyper-v-keeps-pushing-on-vmwar/240008257

If you are tired of paying a premium for virtualization, its time to give Hyper-V another look.