Gran Turismo 5 has been shown in playable form to members of the public in Tokyo recently.
The game was used at a recent display in the Tokyo district of Roppongi to show off Sony's new line of 3D Bravia TVs set to launch around the world this summer.
According to 1Up, the game running in 3D looked no better or worse than it did when shown in 2D form at previous events, although we guess side-by-side comparisons would more clearly reveal some of the cutbacks that necessary to get current-gen consoles running games in 3D.
The site goes on to say that the game's 3D effects appear like 2D images layered on top of each other rather than giving the illusion of full 3D objects. But on the plus side it notes the game's sharp focus and subtle use of 3D makes it easier on the eyes.
3D trailers of Wipeout HD, Motorstorm 2 and Killzone 2 were also shown, but none were playable.
It was recently rumoured that Gran Turismo 5's ongoing delays were to allow developer Polyphony to incorporate 3D support, along with compatibility with for the PlayStation Move motion controller.