The major thing which attracted me to upgrade all of my Machine to Windows 8 Pro is Hyper V (Hyper Virtualization). I mostly run couple of Windows 7 VMs and Windows 8 VMs to test and debug applications on it without harming my main Operating System. You can add Hyper V feature to your Windows 8, It is only supported in Enterprise and Professional Version of Windows 8. Simply go to Control Panel and Click on “Program and Features”