Here's the thing.
(I say this having driven my Model S with ridesharing thru Uber for several months earlier this year...)
The S classic, even with no AP hardware and no hope of EVER being auto-anything,
proved to be already 95% perfect for Uber Ridesharing. The nav, the WOW Factor (starting at the dramatic handle-presenting followed by the passenger getting their first glimpse of the 17" screen
), the smooth quiet ride - with option of quickness when quickness is needed, and overall SAFETY of which the public is becoming more and more aware... really trump all other cars Uber partners are driving. For the driver, the efficiency and cost to operate! I never Supercharged a single watt for Uber-use but costs were STILL so low as to make other Uber partners really take note.
The missing link? No integration between the rideshare app and the onboard Nav, and unwieldy audio media connection. Having to use a smartphone for the rideshare part, and doing navigation/entertainment on the built-in.
Autonomy is not needed, at all. Just a Tesla-offered app that does what the Uber app/network does to connect the passenger and driver/owner. Displays the passenger info, lets the driver assess and accept/reject the request. Plays the passenger's playlist during the ride.
Let this sink in... This could be in the works to install
tomorrow on all Tech Package-d Model S. Passenger "Hail A Tesla" app. It lets owners monetize their sizable investment in that drivable asset. Puts butts in Tesla Seats for brand awareness. Gathers data for any future true-autonomous Tesla fleet.
Elon's remark about Product Announcement
might not be referring to something that has to wait for Full Autonomy.
TL;dr: AJ Question may have been thinking long-term, EM Non-Answer may have been due to Short-Term product plans!