VM is not just a physical server virtualized. Yes, there is a P2V process. However, once it is virtualized, it takes on a new shape. That shape has many new and changed properties, and some old properties are no longer applicable or available. My apologies if the following is not the best analogy:
"We P2V the soul, not the body."
On the surface, a VM looks like a physical server. So let's actually look at the VM property. The following screenshot shows a VM setting in vSphere 5.5. It looks familiar as it has a CPU, Memory, Hard disk, Network adapter, and so on. However, look at it closely. Do you see any property that you don't usually see in a physical server?
Let me highlight ...