The largest contribution physics can make to AI is energy efficiency: computers waste heat hilariously worse than brains do, and nobody has seriously tried to fix it.

I think this is one of the biggest things that physics can help with, and it’s an obvious kind of low-hanging fruit situation where the heat generation, the inefficiency, the waste of existing high-level computers is nowhere near the efficiency of our brains. It’s hilariously worse, and we haven’t tried to optimize that hard on that frontier.