"Michael re-iterates (Sequoia) David Cahn's $600B question, pointing out that if the anticipated infrastructure spend on AI requires $600bn in annual revenue that means 1 billion people will need to spend $600/year or 100 million intensive users will need to spend $6,000/year."

Prospects for this are still questionable. But algo and chip design improvements may give us an order of magnitude or two in energy efficiency...