Elon Musk has showcased his army of $30,000 Tesla Optimus robots that are designed to help with household chores, prompting people to draw comparisons to the dystopian future depicted in I, Robot. In shocking and impressive footage, the humanoid robots were seen stiffly walking in single file across a stage while viewers stood jaw-dropped on the sidelines. Musk said attendees could walk up to the Optimus robots who would do things like serve drinks. 'At scale, you should be able to buy an Optimus robot for $20,000 to $30,000,' he said. 'It can walk your dog, mow your lawn, get...