Server virtualization has revolutionized the way we deploy systems in our data centers. It has sparked a gold rush along the way, creating outlandish wealth. It has also left a wake of destruction, and it very well may cause catastrophic failures in a lot of shops.
It certainly is going to raise blood pressure and cause hair loss among admins.
The Good Parts: Server virtualization lets you bring a virtual machine online in minutes, gets you enormous utilization gains on your hardware, and enables mobility unlike anything we've ever seen before.