Here's Elon Musk's latest self-driving cars promise. And what you can really expect.

If you thought Tesla robo-taxis were a far-fetched Elon Musk delusion, the Tesla CEO doubled down on the self-driving capable vehicles at Wednesday's Tesla earnings call. After a surprisingly profitable quarter (the company made $342 million after back-to-back quarterly losses), Musk sounded optimistic as he talked about full self-driving capabilities for the all-electric vehicles. He seemed heartened by last month's V10 software update which included Smart Summon, a feature that allows Tesla ca...