Yeap... prototype cars are prototypes cars... you don't need to have a real car.

Jordan is the same of the F1? Nike will have a prototype car too.

More detail about the car.

http://www.netcarshow.com/mercedes-benz/2013-vision_gran_turismo_concept/

• The super sports car with its hallmark Mercedes gullwing doors will be taking to the virtual racetrack when the new racing game goes on sale in December 2013 - as the first of the "Vision Gran Turismo" series of vehicles.
• Another eye-catching feature is the radiator grille. However, instead of classic louvres the grille of the show car features exclusively LEDs. The variable LED grille with different light patterns is a further development of the diamond grille introduced with the new A-Class.
• The central display is optimally positioned in the driver's field of vision: it takes the form of a glass surface floating directly above the racing steering wheel with its shift paddles, and shows all the relevant information such as road speed, engine speed and operating temperature as required. Operation is by rocker switches in the centre of the dashboard and in an overhead console, like in a jet.
• It develops 430 kW (585 hp) and a maximum torque of 800 Nm.
• The AMG sports exhaust system with eight tailpipes integrated into the rear end.