Attending the NFV World Congress last week gave me a chance to talk to many carriers about their migration into a virtualized network. Many have made big progress. In fact, Verizon has already begun to deploy an OpenStack environment.
Carriers continue to aggressively push into NFV with NTT announcing they will virtualize 75% of their network by 2020. AT&T and now NTT Docomo and many others have either declared their virtualization goals or have begun to take active steps toward achieving them.