Nvidia (NVDA -0.02%) has been among the best-performing stocks of 2024, and it's easy to see why. The company provides the graphics processing units (GPUs) that quickly became the gold standard for powering artificial intelligence (AI) systems. The wave of demand for its chips has pushed the company's market cap to nearly $3.7 trillion as of this writing, currently making it the world's second most valuable company.Yet some investors are already looking ahead, as advances in AI these days are coming fast an ...