Not yet, as the OS is still unmanageable.
If MS finally does what their labs have been talking about for years and creates a fully managed OS, then it will.
This OS will not be backward compatible. First they will have to create managed versions of Office, IE, etc. They will need to create a virtual machine to run unmanaged applications.
The pain will be something like a switch from Mac OS9 to OSX.
Keith source share