Tesla (TSLA 0.04%) gets most of the media attention when it comes to robotics, thanks to its humanoid robot prototype, Optimus, and Elon Musk's bold claims. In fact, last year Musk said that Optimus could eventually be worth more than everything else from Tesla combined. But while Tesla talks about the future of robotics, Amazon's (AMZN 1.62%) robots are already delivering the goods -- both literally and figuratively. In fact, Amazon is already the largest manufacturer and operator of mobile robotics in the ...