Simply another version is NSX
It appears M$ are looking to create another version of NSX which is being developed further by VMWare for use on their platform.
The technology is already there, M$ and others are just starting to expand the way it is used and implement in designs that will help advance other designs. The fact that it is based on Linux is not so far from the proverbial fetching, as most switches/AR's/CR's use a Linux base. It just makes sense.
Biting the hand that feeds IT
