Jensen Huang stood in Taipei on Monday and declared the personal computer reborn. Forty years after the original PC wave, Nvidia’s CEO unveiled the RTX Spark superchip. It packs one petaflop of AI performance, up to 128GB of unified memory, and the full weight of Nvidia’s CUDA and RTX software stack into a single package built for Windows machines. The chip, developed with partners including MediaTek, aims to run sophisticated AI agents directly on laptops and desktops. No constant cloud calls. No latency lag. Just an intelligent assistant that understands context, reads files, performs research, and acts on commands. “The PC is being reinvented,” Huang said. “For forty years, you launched apps. Click. Type. With RTX Spark and Microsoft Windows, you ask — and the PC does the work.” That shift from tool to teammate carries heavy implications for the $200 billion-plus PC market. Nvidia, already the world’s most valuable company, now targets the devices millions use daily.…