The technology behind generative AI like ChatGPT has exploded, fueling a demand for chips that can handle the complex processing power these programs need. Big tech companies Microsoft, Amazon and Google are all designing their own chips because they can optimize their computing workloads for the software that runs on their cloud. But what does the future of the industry look like? WSJ explains how these AI chips work, how they differ from normal computer chips and whether the tech will have a long lifespan.