Tesla may be ready to enable more self-driving features in its newest cars before the end of December, Elon Musk tweeted tonight. "Looks like we might be ready to rollout most of Autopilot functionality for HW2 towards the end of next week," the Tesla CEO said, referring to the hardware introduced to new Tesla vehicles in October. Several of these features had actually been included in the previous version of Autopilot, but Tesla said that they would need to be "robustly validated" before they would be reintroduced.