Windows 8 desktop O/S will include Hyper-V support, however there seems to be some confusion about hardware requirements.
Hyper-V server has always required:
“Processor : x64 compatible processor with Intel VT or AMD-V technology enabled.
Hardware Data Execution Prevention (DEP), specifically Intel XD bit (execute disable bit) or AMD NX bit (no execute bit), must be available and enabled.” (from http://www.microsoft.com/download/en/details.aspx?id=3512)
This hasn’t changed with the Hyper-v server version of Windows 8, but the desktop version of Hyper-V will require the processor also be SLAT compatible. So, how do I know if my system will support Hyper-V? Microsoft has a simple little command line tool called CoreInfo that will check for all requirements. http://technet.microsoft.com/en-us/sysinternals/cc835722
Simply open a command window with elevated privileges and run coreinfo –v to display the supported virtualization features. An asterisk indicates supported and a dash means unsupported.
Intel64 Family – indicates 64 bit support
Hypervisor is present – shows if the Hypervisor role is currently enabled
Supports Intel hardware-assisted virtualization – verifies Virtualization support
Supports Intel extended page tables (SLAT) – confirms SLAT compatibility
Another little utility worth mentioning is Securable by GRC.com This has been a standard for testing for Hyper-V compatibility, but so far does not include tests for SLAT support. It does however have a specific DEP check. http://www.grc.com/securable.htm
I should also point out, if you plan to enable Remote FX support on a Hyper-V server (a server O/S), whether Server 2008 R2 or Windows Server 8, you will need a SLAT compatible processor.