Be prepared to wait if you're part of the majority that isn't using HW2, though. Musk expects that Autopilot update to arrive in late January. While the delay is somewhat understandable when newer vehicles have upgraded sensor hardware, it also suggests that you may need to get used to gaps between updates for different models – especially as Tesla rolls out hardware-specific features.
HW2 Autopilot software uploading to 1000 cars this eve. Will then hold to verify no field issues and upload to rest of fleet next week.— Elon Musk (@elonmusk) December 31, 2016
This article by Jon Fingas originally ran on Engadget, the definitive guide to this connected life.