Nvidia's next big growth catalyst is hiding in plain sight.Nvidia (NVDA 4.26%) CEO Jensen Huang has been defining how the future of artificial intelligence (AI) will evolve. New terms like "sovereign AI" and "AI factories" are being splashed all over business news sites. But what do they really mean?For investors, one thing they should mean is that Nvidia remains the one stock to buy to take advantage of global AI growth. The company has been the leader in selling the hardware needed to support massive comp ...