The point of the tweet was to show that’s it’s funny how Ford solved this problem. They could have done it all complicated with two displays, one with a circle

The point of the tweet was to show that’s it’s funny how Ford solved this problem. They could have done it all complicated with two displays, one with a circle punched out and the other one a small circle, but they opted to mimic human touch with a simple mechanical dial that simulated “touch” on the screen. Handle the rest with software.