I agree with a demo being unnecessary.
The only thing PTK needs is a big name, and/or big numbers. Insider buying and Sanan buying a few fat chunks sure wouldn't hurt either.
If they are to have a demo, it could be an opportunity to describe how the technology can and is being used in EV vehicles which may include Tesla, GM, Nio - not refrigerators. Describe how the technology is "proved out" (is this an in-industry term?) and have clear graphs - PTK >> Intel's.