Five years from now, few enterprises will use "real" computers. Everything done with databases, Web applications or file shares will be intercepted and emulated by virtualization software, allowing one rack-mount server to act like 10.
Virtualization is inescapable; it's the most important new force in enterprise IT since IP networks.
Virtualization is a win for enterprise security. Patching, staging, deployment and change management--chronic headaches for IT security--get easier in virtualized data centers.