Key fob
When they do, I hope the designers remember Arizona monsoons.
You see, most of Arizona can get fairly hot in the summer. It's not unusual to leave the windows down, at least outside the metro areas. And that works out pretty well.
Until the rain hits.
If you can have remote power door locks and trunk locks, you can have something that rolls up the windows. If you ever experience an Arizona monsoon storm, you'd know how important it is to stay inside.