Wall Street’s early reaction to Elon Musk’s robotaxi reveal? Disappointment.Shares in Tesla fell roughly 8% in morning trading following an event that was heavier on showbiz but lighter on business than investors had hoped after months of buildup.

By Chris Kirkham LOS ANGELES (Reuters) -For a businessman who perpetually struggles with broken promises, Elon Musk gave himself quite a to-do list Thursday night at Tesla's long-awaited Hollywood unveiling of its driverless robotaxis.

Along with the robotaxi, Tesla is expected to provide updates on its humanoid Optimus robot — after all the event is titled “We, Robot,” a reference to Isaac Asimov’s seminal work I, Robot . Tesla might also show one of its mystery vehicles — a van or a cheaper car that could compete with China’s growing affordable EV market.