Offer a way to save and restore all the vehicle’s settings including seat memories, mirror positions, Bluetooth settings, HomeLink, and any other owner settings. These should be saved to the cloud and/or a USB stick in a way that the settings can be transferred to another car. This would be especially handy for temporary use in Loaners.
Ideally, it would cleanly handle transfer between different model types and different software versions.
Per Elon tweet 21-Aug-17, settings will be moving to the cloud (no timeline though).