Today, only 12% of x86 server workloads are running in virtual machines. By 2013 that number will be 61%.

One out of every four x86 workloads deployed or redeployed in 2008 is being installed in a virtual machine. Still, vendor licensing, pricing and support plans are limiting virtualization efforts, according to 21% of conference attendees.

About 70% of virtual machines today are used in production. Just a few years ago, most were used only in test and development roles.

The market will grow 30% a year through 2013, reaching $6.8 billion.

Desktop virtualization will also take off, with the number of virtualized PCs growing from less than 5 million in 2007 to 660 million by 2011.