A new iteration of the Optimus robot was unveiled at Tesla's We, Robot event, where Elon Musk said it would eventually walk the dog.

We may be on the brink of a new era where robots not only perform tasks but also become embedded in human society.

One of the highlights of Tesla’s “We, Robot” event wasn’t the self-driving cars but the allegedly autonomous robots. Tesla’s Optimus bot isn’t new, but this is the first event where actual robots joined the stage—and the crowd—rather than a person in a robot costume. Or was it?