Well what the article does not tell you is that Windows 7 Pro included a full licensed copy of Windows XP pro via the Windows XP mode. Installing Windows Pro in the Windows 8 Hyper-V will require you to purchase a full version of Windows XP pro ($199 retail) effectively doubling the price of the Windows 8 Pro\Windows XP as opposed to Windows 7 Pro\Windows XP that we had before. Microsoft should think about offering a lower price VM license for customers who upgrade to the latest O/S but still need to run legacy software occasionally in a VM.