Please clarify something. I have had the new UI for at least a year. What I call "new" is the one that is NOT the legacy Google Voice. However in my new UI Settings page, I have slider buttons for various features, but I don't have the side tabs like in your screenshot. I.E. no menu on the left to choose Phone Numbers/Messages/Calls/Voicemail, etc. Instead all those categories are laid out linearly from top to bottom on one long scrolling page.
So, is the one with the side menu part of the VOIP beta as well, or should current GV standard accounts see those side headings now? Or IOW, is the "long format" page I'm seeing the latest correct layout for non-beta users?