Agreed. Elon Musk said in the video in Berlin:
It's a radical redesign of the core technology of building a car. And some of this when I do Battery Day later in September I'll talk about what we're going to be doing here in Berlin but it will be the first time that there is going to be a transformation in the core structural design of the vehicle. It's quite a big thing.
My read on this is a revolutionary and faster way to install batteries in the structure of the vehicle that will drive down production costs. Else why would he talk about it for Battery Day? Batteries and drive unit(s) are the "core technology" of a BEV, no?
With pre-market at $407, 9/22 Battery Day cannot come soon enough!
Think this is about production of vehicle separate from battery. Is about disrupting assembly line technology with ever more complete automation which is something else the OEMs appear to have been sleeping on the past 20 years.
Tesla never stopped working on the alien dreadnought after the disaster of the Model 3 launch. Based on their pace of innovation think they are getting results e.g. casting machine.