This is not shade on the original comment. But I do find it funny when economists that extrapolate out to infinity.

Comely divorced from the real world materials and ecology.

Efficiency going up is one way to reduce instillation costs which grid scale solar really cares about.

470W + even cheaper inverters seems likely.

Thin-film solar panels will be much cheaper than that. They will be printed in huge quantities.

Economies of scale baby. Another 10x more in production another 30% less in price.