Robots of all kinds caused a stir on the show floor this week at the annual CES technology trade show in Las Vegas. There were robots that can make coffee and chef-like robots that advertised a future with autonomous restaurants. But these innovations worry Las Vegas Strip casino workers who can’t help but wonder if the clock is ticking on hospitality jobs in the age of AI. That's why the casino workers union says 40,000 workers on the Strip were willing to go on strike last year if their new contracts didn't include stronger job security against AI.