I think Musk is missing the boat, too. The real future is in AI Cat Litter. Each little bit of clay now has a WIFI connection to the Cloud. You can ask it questions, and when your cat comes by - lol, as long as you pay the monthly subscription! - 'ol Tabby will pee out the AI answer!

Perhaps this invention will be as popular - and profitable! - as self-driving cars. Maybe.