Philip Ball warns against the unbridled enthusiasm of some tech leaders regarding artificial intelligence. He argues that these 'AI experts' are increasingly detached from the practical realities and limitations of the technology, succumbing to their own hype. This overestimation, according to Ball, poses potential risks, as it can lead to unrealistic expectations, misallocation of resources, and ultimately, public disillusionment with AI's capabilities. He urges a more grounded and realistic assessment of AI's current state and future potential, cautioning against blindly accepting the pronouncements of those who may have a vested interest in exaggerating its progress.