Echoing economist Robert Solow's 1987 observation about computers, thousands of CEOs now admit AI has no measurable productivity impact. This suggests history is repeating, where major technological shifts have a long, multi-year lag before their economic benefits are truly realized and measured.

Contrary to the feeling of rapid technological change, economic data shows productivity growth has been extremely low for 50 years. AI is not just another incremental improvement; it's a potential shock to a long-stagnant system, which is crucial context for its impact.

Traditional metrics like GDP fail to capture the value of intangibles from the digital economy. Profit margins, which reflect real-world productivity gains from technology, provide a more accurate and immediate measure of its true economic impact.

Current spikes in labor productivity are not evidence of AI's impact. They are more likely a statistical artifact caused by a compositional bias towards capital-intensive sectors and companies forcing remaining employees to do more work in a weak labor market. The true AI productivity effect is not yet visible in aggregate data.

Sam Altman suggests that as AI models create enormous economic value, proxy metrics like task completion benchmarks will become obsolete. The most meaningful chart will be the model's direct impact on GDP. This signals a fundamental shift from the research phase of AI to an era of broad economic transformation.

The anticipated AI productivity boom may already be happening but is invisible in statistics. Current metrics excel at measuring substitution (replacing a worker) but fail to capture quality improvements when AI acts as a complement, making professionals like doctors or bankers better at their jobs. This unmeasured quality boost is a major blind spot.

A National Bureau of Economic Research survey of 750 financial executives reveals a "productivity paradox." They report significant performance improvements from AI, but these gains are not yet reflected in hard revenue numbers, showing a lag between perceived value and financial impact.

Leaders must budget for a temporary negative ROI when implementing AI. The initial phase is dominated by a steep, inefficient employee learning curve that decreases productivity. True financial and operational benefits won't materialize for 6 to 12 months, a timeline that clashes with typical quarterly reporting cycles.

History shows a significant delay between tech investment and productivity gains—10 years for PCs, 5-6 for the internet. The current AI CapEx boom faces a similar risk. An 'AI wobble' may occur when impatient investors begin questioning the long-delayed returns.