Over at the Tokyo Auto Salon 2010, Polyphony Digital showed off a "GPS-track day unit," which is a little box with a card slot in it that you install in a very expensive car like, say, the Toyota FT-86G Concept, as seen above in the new trailer for Gran Turismo 5. That unit will then record your likely very expensive real-life run around a driving track like the famous Nürburgring lap, at which point you'll be able to pull a card out, plug it in your PS3, and then see the real-life run simulated inside the video game itself, where you can watch or even ghost race against it.
It was also mentioned at the Auto Salon that there will be a 3D version of GT5 out "as soon as 3D TVs become available on the market," so presumably later this year. Thanks for watching! Next time on Expensive and Awesome Stuff That You'll Never Be Able to Do: land your very own helicopter on your very own superyacht.