your ignorance of real datacenters is only eclipsed by your failure to understand the VMWare product
Please discontinue spreading your lack of understanding to the masses. Despite any "market lingo" and fancy schmancy analyzation that you would like to perceive you are capable of, you appear to be sorely detached from the real ground level work that happens in datacenters.
ESX server is not "on Windows Platforms", it is a custom linux kernel that provides the opportunity to install just about any platform that you might require. Is solves a problem not originated by Microsoft's server operating system team, but by software developers that write such poor and inefficient code that their software demands it's own server so it doesn't crash.
VMWare is is no real trouble from Microsofts Hyper-V. The feature set is firmly eclipsed by VMWare's product, not to mention the reliability and longer market exposure VMWare has had.
VDC-OS will fill a market that MS is incapable of working in because MS can only think "larger and more complex" when the real solution demands "simpler and smaller". VMWare's products are a golden key to the city of joy for all who embark on the journey of Virtualization. MS will never fill that niche. They are no longer innovators. They are caught up too tightly in their own massivity and political complexity.