It's becoming clear that artificial intelligence (AI) isn't just a stock market sensation but a remarkable innovation that will impact the world in countless ways. According to a PricewaterhouseCoopers (PWC) study, AI could contribute over $15 trillion in economic value to the global economy by 2030.Identifying and holding the companies driving AI's growth could prove very lucrative for long-term investors. That's why I set out to find them. While anything can happen in the future, today's thoroughbreds loo ...