Berlin Model Y is the one to watch. That is a revolution in automotive body engineering (finally).
— Elon Musk (@elonmusk) July 10, 2020
It seems that the technical novelty concerns frame construction. With the Model Y, Tesla had made important progress in this direction, with a new casting technique that had allowed to move from the realization of 70 parts to 1 only. A new technology that had allowed for simplify the construction of the SUV, while also reducing costs. Elon Musk, however, pointed out that this important improvement was only the beginning with the aim of using this fusion technique on a larger scale.
Certainly more will be known over the next few months. Speaking about the Gigafactory in Germany, Musk said they are evaluating the possibility of designing and building a small electric sedan. Again, there are no details, but since a design center should be open in the factory, it is possible that some surprises will come in the future.