I honestly believe it's because SONY announced 3d gaming for PS3, 3D would have put them completely up there in innovation, and people would have gone nuts for a gaming machine that displays 3d..
I know nintendo isn't stupid, and said "we can't let them take that market before we get to it" so there you go, 3DS! Just a theory though..
btw.. I noticed that you need a 3D BLU RAY PLAYER to get 3d movies, and most of them are $350+ the PS3 is going to be one that plays 3d blu rays and 3d games, so I guess that's another plus for those interested in a 3d HD experience.








