I was recognized by the front desk of the Marriott Waikiki Beach as a platinum-premier ambassador, despite Marriott.com and the Marriott mobile app showing me as a platinum-premier. I still haven't been contacted by an ambassador, but whatever.
This property now gives out fancy black keys that are branded "platinum elite" (see here:
https://www.flyertalk.com/forum/30152269-post636.html) Of course, the keys completely ignore the fact that platinum-elite is two status levels below platinum-premier ambassador.
I suspect other properties will soon get the new keys. All of my other post 8/18 stays have been at properties with the legacy Marriott or legacy SPG keys.