This Sunday afternoon, Elon Musk tweeted about the imminent Autopilot release for HW2 Suite Teslas which, as promised, will launch next weekend.
HW2 Autopilot release should go wide next weekend with additional smoothness improvements to longitudinal control
— Elon Musk (@elonmusk) June 11, 2017
The update will be deployed only to HW2 Tesla cars (which have been in production since October, 2016), because the first-generation (HW1) cars lack sufficient computing power and sensors to handle it. This update will correct issues with the original control algorithm, which was “safe, but unpleasant,” to use Musk's own words. Rain sensors and perpendicular parking may also be part of the update.