So self-driving will be a standard feature of Model 3, not an option? Pretty cool if they can make it work. I'm skeptical that the computer (NVIDIA Drive PX 2 perhaps?) will have enough power to do it all without LIDAR.
Self-driving hardware will be standard on Model 3, but you'll likely still have to pay a premium for the software to activate it. This is akin to Tesla including the 75 kWh battery on the 60 kWh Model S, and then charging you extra to "activate" the battery's full capacity.
The hardware will be standard, but almost certainly you'll pay extra to enable it. (If they do it the same as similar features in the past, there will be a discount to enable it at order, or you can do it later at a slight premium.)
That'll be an interesting court case: the first time a fatality is the result of unactivated safety features on a car that's fully capable of preventing a collision.
Tesla has already said that the Model 3's safety features will come standard, though it wouldn't preclude such a lawsuit against the owner if the features weren't activated.