What is the MMI touch response system in the Audi A7 and how does it work?

I've heard about the MMI touch response system in the Audi A7, but I'm not sure what it is or how it works. Can someone help explain it to me?

The MMI touch response system is a state-of-the-art infotainment system in the Audi A7 that allows you to control various functions with just a touch or swipe of your finger.

The MMI touch response system consists of two touchscreens - an upper and a lower one - which replace the traditional controller and buttons for a more intuitive and modern experience.