As mentioned in Re: windows OEM license in virtual environment you may need to check with the EULA. Microsoft offers licensing classes which last several days and have tons of white papers for licensing. I guess not even someone from Microsoft can answer this question for sure.
However, IMO this would most likley violate the EULA.
VMotion depend of type of license VMware, no of Virtual Machine Guest OS. Check EULA microsoft to do it .