Ivan Pepelnjak from ipSpace.net comments:

In his recent blog post Joe Onisick wrote “What network virtualization doesn’t provide, in any form, is a change to the model we use to deploy networks and support applications. […] All of the same broken or misused methodologies are carried forward. […] Faithful replication of today’s networking challenges as virtual machines with encapsulation tunnels doesn’t move the bar for deploying applications.”

Read more at: Where’s the Revolutionary Networking Innovation?