Musk said the $20,000 to $30,000 robot could perform household tasks like mowing lawns and putting away groceries.

His most important future product was acting very much thanks to human intelligence with critics calling it a “parlor trick.”

Tesla's "We, Robot" event showcased the company's latest advancements in autonomous technology, but the stars of the afterparty were the Optimus robots, which mingled with guests,