Elon Musk has a long history of making big promises — and Tesla investors used to be OK with that. Has something changed?

Investors hoped Tesla’s long-awaited robotaxi demonstration would deliver on substance and not just style. On Thursday, Elon Musk did show off real vehicles and humanoid robots who walked among guests—not just a dancer dressed in a robot bodysuit,

Elon Musk unveiled the Cybercab on Thursday night at a highly anticipated event, where he also showed off new protoypes of a robovan and humanoid robot.