AI spending is significant more in inflation adjusted dollars. (Roughly 550 Bn in modern dollars). We're projecting trillions in AI spend.
But as a % of total GDP, you are correct.
But as a % of total GDP, you are correct.
In terms of infra spending as a percent of GDP, 1880s railroads were at 5-6% at peak while AI is estimated to reach 3+% in a year or two.