Tesla's upcoming Robotaxi event on Aug. 8 has the potential to spotlight Alphabet's Waymo division. While Tesla garners attention for its self-driving car ambitions, Alphabet's Waymo already operates autonomous taxis across the U.S. Analysts suggest that renewed interest in Waymo could significantly boost Alphabet's stock. The autonomous vehicle market is vast, with potential revenue in the billions. As both companies vie for a share, Wall Street sees self-driving cars as a trillion-dollar opportunity.