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”
In Programs and features simply hover over to left side on “Turn Windows Features On or Off” and than Click on Hyper-V and “press OK”.
Now Windows will install that feature so be Patient!. When installation is complete Restart your PC and enjoy Hyper Virtualization on your Windows 8 Pro or Enterprise Machine.