Gran Turismo 5 Prologue is about to get a pretty nice upgrade. The next time you start up your Playstation 3, an update will be available for GT5 that will add the GT by Citroen, Ferrari's new California and the Lotus Evora. Lotus fans got a sneak peek into the Evora's GT5 inclusion at the British Motor Show a few weeks back, and now everybody gets to join in on the aluminum-intensive fun. It's always been a pleasure to strap yourself in a Ferrari, in real-life or virtually, and the California is the latest Italian Stallion around, so its addition is a foregone conclusion. The biggest news, though, is the new French GT, which it's maker says was "a partnership between Citroën and Polyphony." In the game-realm, the new GT concept will be powered by electrons generated from a hydrogen fuel cell. Even if the technology isn't quite ready for prime time in your driveway, it can always make waves in digital form, running around various race tracks while emitting nothing but water.