Hand gestures to cameras so you can open frunk or trunk without having to get keys out.
Be able to view the cameras remotely from the app to check your car for live feed if the alarm is triggered.
Have an option to lower and raise windows remotely to allow easier access with frameless doors in tight spaces without using summon and also to vent the car before you get to it in hot weather, and also linked to rain sensor so that they auto close if it rains.
Be able to see battery temperature in the car and on the mobile app.
Edit: clarified that this idea is about displaying the temperature.
Be able to 'nudge' the car by giving 'hints' to autopilot so you can gently steer the car while in autopilot to help it to learn faster and guide it away from curbs when it gets too close without having to take over completely and disengage autopilot.
Allow other users in the app to control some features in the car with limited privileges the owner can set.
Have a maximum start-up volume for the stereo if someone has left sound on loud.
Have mirrors that fold when locked but only unfold when you put it in drive or reverse (so they don't open every time you walk past your car on the drive with the key in your pocket) and also add location setting to the function.
Be able to have 'Chill Mode' on the RWD version cars so that they're easier to drive in slippery conditions.
A max or min button for charge rate so you don't have to hit the button 25 times to go from 5a to 30a
There should be an option where the car will automatically brake to 0mph within a certain distance of an object such as areas with high traffic and where cars will stop a lot or parking in tight spaces.
Capacity to store at least a few songs on car to prevent Spotify stopping when you lose signal.
Be able to directly link to car via app or key or Bluetooth in UK to enable summon without mobile signal dependency.
Temperature-sensitive options on the menu, for example, heated steering wheel and heated wipers button brought to
main screen when temp below 3 degrees C.
Be able to send messages to and from the car so the driver can see them in case someone forgets phone or phone isn't working.