Elon Musk predicts that Tesla's robotaxi service will be prevalent in the U.S. by the year's end, supported by VP of AI software Ashok Elluswamy's statement on starting with a few unsupervised vehicles. Despite facing skepticism from consumers regarding safety and competition from firms like Waymo and Baidu's ApolloGo, Musk remains optimistic. He also revealed plans for public sales of Tesla's Optimus robots by 2027, highlighting rapid advancements in AI.