"Launch" invokes a mental image of a rocket taking off, but that isn't really an apt metaphor. Waymo has already had vehicles on some routes move passengers without safety drivers onboard. They've been charging some EZ Riders for their rides. When they do 'launch', the service still will not be available to the general public. The major thing they'll be doing is unveiling their new brand, whatever it is. They've been gradually expanding the scale, range, and capabilities of their fleet in the Phoenix metro area and they will continue to do so.