According to IDC's Worldwide Quarterly Server Virtualization Tracker, “16.5% of all new servers shipped in 2Q09 were virtualized, an increase from 14.5% in 2Q08. However, actual shipments decreased 21.0% year over year to 246,000 physical servers in 2Q09 as customers continue to limit spending on new server hardware relative to last year. Similarly, worldwide virtualization software revenue declined 18.7% year over year in 2Q09 to $344 million. Virtualization licenses did grow quarter over quarter in 2Q09. The server virtualization market continues to shift towards use of paid hypervisors, with paid virtualization software now running on 60.8% of all new server hardware shipments virtualized in 2Q09, an increase over 57.2% in 2Q08.” Also read Roger Johnson's post; He discusses Dell PowerEdge R910 and his Hyper-V deployment at Crutchfield.
Source:→ Virtualization blog