Robotaxi event invitations were officially sent to Tesla investors on Wednesday and while most of the details are still under wraps, Chief Executive Elon Musk is setting sky-high expectations for the event. "This will be one for the history books," Musk posted to X on Wednesday, along with a photo of the event announcement. On Sept. 11, Musk wrote on X that in his opinion the robotaxi reveal will be the most significant moment for Tesla since the EV company unveiled the Model 3 nearly nine years ago.