This catalyst could be worth billions of dollars for Nvidia.Nvidia (NVDA 2.18%) shares have roared higher over the past several years, thanks to the company's dominance in the artificial intelligence (AI) chip market -- it holds a more than 80% share. But recently, the stock has lost some of its momentum, falling more than 6% over the past month. Some investors have worried about growing competition in the chip market, and others fear that any slowdown in AI spending could hurt the company.In my opinion, th ...