As referenced during the self-driving reveal, the plan is to inch toward the late 2017 goal of full autonomy through incremental "monthly releases." Features like an upgraded Autosteer (using the newer cars' extra cameras) and Smart Summon (which isn't limited to moving the car in a straight line) are on the way... you may just have to wait months to see them. That isn't much comfort if you just spent a small fortune on a Tesla and want to show it off, but your patience will hopefully be rewarded.

@edwardsanchez about three weeks and it will get rolled out incrementally in monthly releases — Elon Musk (@elonmusk) November 27, 2016