The AI market boom has left 99% of US households wondering how they will benefit, as most rely on wages rather than investment income. (AFP pic)WASHINGTON: The US is in the middle of a historic and costly technological revolution, with the artificial intelligence buildout driving a level of investment set to eclipse the previous telecommunications boom, as well as national projects like the construction of rail and highway networks.

The transformation has spurred immense stock market gains that have boosted household wealth across the economy, which arguably has helped to keep consumer spending on track. But with investment gains concentrated among the already rich, some Americans are benefiting more than others.