I could be wrong but the phrasing of the FAQ on on the information page seems to suggest 3rd party stores using this tech could start popping up in a few months.
To me the Waymo announcement would be as momentous if they said:
> How long will it take to install [self driving] technology in a [car]?
> The installation of the technology can take as little as a few weeks from the time we have access to your [car].
I suppose the page doesn't directly explain when they will start the installations. But from the phrasing, I wouldn't be surprised if we hear an announcement of some sort of launch plans with a partner store in the next Month. It seems relatively imminent. Of course, I think there were other Amazon Go related announcements that didn't pan so who knows.