VMWare liberate the server by making it independent from the hardware. Once you virtualize it, it can run on any x86 hardware. Provision become short from months to minutes.
Now NICIRA will do the same to the network by doing network virtualization. Network will be free form vendor lock down. So long the switches is IP connected, NICIRA wil virtualize it.
By the way, in the website written there NICIRA by VMWARE.