The product lifecycle within Stromer AG is at least 2 years before they upgrade it or bring a new model.
I agree, motor and frame will remain untouched.; therefore, I expect peripheral upgrades. Furthermore, speed is limited to 45km/h and motor to 1000W; both by law. But battery could reach "Tesla" level - and as Samsung build the cells, this is in range.
For those who waiting for the MTB: This bike already exists, it's called Rotwild - and Specialized will come up with a simple copycat called "Levo"
The original with 90NM Brose motor, excellent weight balance, full suspension, less weight, good styling and 25km/h speed limit: