Cos you need half of each picture frame to make 3D, therefore it is ideal for 60fps games is best for 3D.
60fps games will make 30fps on the 3D screen, that's why three games has 60FPS support.
Motorstorm 2 is not really 60FPS (in play) but the replay event is, just like this CES show didn't let Motorstorm 2 playable otherwise it will be 15FPS on 3D screen which it is unplayable.
Killzone 2 on 3D would be nice but unplayable 15FPS for shooter.
Good thing it is promising for any future 60FPS games might get true 3D support .
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