Humanoid robots, however, are a much harder problem than building a mass-market-ready electric car. In order for someone to bring to market a robot that can perform general household tasks, for instance picking up dirty laundry around the house, putting it the washing machine and dryer, then folding or hanging it up, then they first need to make multiple fundamental several-order-of-magnitude breakthroughs in the fields of machine vision, robotic locomotion, energy storage, artificial general intelligence, etc.
I'm not dismissive because I don't think Tesla is full of brilliant people who can do amazing things. I'm dismissive because building a useful, mass-market humanoid robot would be an achievement of incredible magnitude that's as far outside of the current envelope of technological achievement as the moon landing would have been to the Wright brothers.