My pre-AP P85 is not updated yet either, although has been on Wi-Fi most of the day. Hopefully soon. Anyway, I look forward to especially the parking improvements - although they are stuff Tesla is playing catch-up on, I will appreciate the possibility to get this stuff after the fact. Both the camera guides and full-car sensor graphics are very welcome. I've owned many cars with fairly sophisticated graphical interfaces, but already the P85 has received more updates - and more substantial feature updates - than all of them combined. Also, I look forward to any and all improvements to the still a bit lackluster navigation.
For adaptive cruise, I will have to wait for the Model X, but having driven many cars with adaptive cruise I do think it is a great feature. For you experiencing it for the first time, enjoy.

It is a big less magical ten years later (still have one ICE with it), but still, a great feature I look forward to in the Tesla as well. So, savor the first times you use it, if it is your first adaptive cruise. I look forward to Tesla turning the adaptive experience into that full-blown AutoPilot and really wowing...