Tough. It's a luxury Audi, so it has paddle shifters. They just have to figure out something for them to do.

In this vehicle they control the regenerative braking, i.e. make it more or less aggressive.

Electric cars could have gears (e.g. Formula E)

Also, the koenigsegg hybrid uses the paddles to control things other than the gear (Since AFAIK it has a CVT)