Tesla CEO and X owner Elon Musk appears on a screen as he virtually attends the Future Investment Initiative (FII) in Riyadh, Saudi Arabia October 29, 2024. REUTERS/Hamad I Mohammed Purchase Licensing Rights, opens new tab

 By 2040, there will be at least 10 billion humanoid robots priced between $20,000 and $25,000, Elon Musk said at the 8th Future Investment Initiative conference, which began on Tuesday in Saudi Arabia’s capital, Riyadh.