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Elon Musk's announcement livestreams from Austin. Screenshot: Terafab

Elon Musk took the stage in Austin on Saturday night for what he called a "profoundly important announcement … the most epic chip-building exercise in history, by far." His goal: producing 1 trillion watts (1 terawatt) of compute power per year, most of it deployed in space.

Why it matters: Musk said his Terafab chip-building project — a joint effort of his Tesla, xAI and SpaceX companies — is "the next step towards becoming a galactic civilization" and turning "science fiction to science fact."