I recently received some interesting internal marketing information regarding how the Microsoft Virtualisation products are now so much better than what VMWare has to offer. There are a couple of points that were mentioned that I thought I would share here with everyone. This table should be nice and clear!
Windows Server Hyper-V
Windows Server 2008 Hyper-V is the hypervisor-based virtualisation feature included as part of Windows Server 2008. It contains everything needed to support machine virtualisation. It allows you to virtualise multiple operating systems — Windows, Linux, and others — on a single server and fully leverage the power of x64 computing. With virtualisation built into the operating system it will run faster and work better with your hardware right from the start.
More information: http://www.microsoft.com/windowsserver2008/virtualization/default.mspx