You can completely disavow the last statements regarding the car is an Audi R8/SLS Rival because it is not. And neither is it a supercar.
To understand the concept you have to look at how can a sports car be acceptable in the future , not the present , no V8 , no V10 a Concept all about sustainability, and a precursor to how BMW will incorporate areas seen on the "Vision Efficient Dynamics" on future BMW's in ways of drivetrain , power and aerodynamics.
But the Concept is purely to show how BMW can produce a sustainable sports car for the future. It's a leap over todays sports cars and it's how BMW will interpret a Sports car for the future. To which the game will be played differently to which it is now.