Nvidia's RTX Spark superchip enables on-device agentic AI, positioning Nvidia to dominate both data centers and the fast-emerging edge AI market. Smart hybrid routing shifting AI tasks from cloud to device could finally trigger the long-awaited AI PC supercycle, significantly expanding Nvidia's total addressable market. The author rates Nvidia stock a solid buy at $200, with fall expected to reveal RTX Spark's true long-term consumer market potential.