In its 18th annual GTC conference last week, Nvidia Corp. not surprisingly aimed to get audience members’ hearts pumping for what’s next — which obviously is the rapid evolution of artificial intelligence. Nvidia co-founder and Chief Executive Jensen Huang once again played his traditional keynote speaker role. As usual, he was dressed in all black, including a leather jacket. On Tuesday, Huang held court without a script for more than two hours, introducing Nvidia’s upcoming products.