Significant Improvements Possible OTA
Tesla's next big over-the-air update (8.0) for the Model S and X will likely include improvements to the Autopilot system.
But ahead of that update (and likely to make sure what Tesla CEO Elon Musk promises is actually possible) Tesla held a conference call with Bosch (manufacturer of the radar sensors used in the S & X) to determine if improvement in Autopilot are possible with the current hardware.
The answer? Yes..."significant improvements" are possible simply via an OTA update to the vehicles, meaning no new hardware is required at this time to improve Autopilot.
We're certain that future Tesla's will ship with improved sensors and other new Autopilot-related equipment, but at least we now know that the Teslas on the road can still be improved in Autopilot functionality via a software update.