Elektra has reminded us that in 2016, Musk outlined part two of the plan. In terms of vehicles, Musk talked about "heavy-duty trucks and high passenger-density urban transport," and "a future compact SUV and a new kind of pickup truck."

So far we've seen a concept for the Tesla Semi and the Tesla Cybertruck, neither of which look like they will be in production for some time, if at all in the Semi's case. That leaves a "high passenger density urban transport" vehicle still on the to-do list.