Booting from VHD

The (virtual hard disk) feature, introduced in Windows 7 business editions and available in Windows 8 Pro, allows IT pros to create virtual drives for testing apps or testing beta versions of an operating system without affecting the performance of the computer's actual OS. A VHD installation is not a virtual machine, which can hinder a PC's overall performance.

Remote Desktop (Host)

Remote desktop functionality is nothing new in Windows. Windows 8 and Windows RT both include a Remote Desktop client. But if you want to host that remote desktop session, then you will need Windows 8 Pro or Enterprise.

What's the difference between host and client? Remote Desktop hosting provides the "connect to" capabilities, whereas a Remote Desktop client just provides the ability to be accessed.