“We view 3D as having the greatest potential, in the near term, in what I would call a dedicated entertainment environment. And that’s in the home, around the television, and where it’s a shared experience. I think that’s really important. We struggle a little bit to see how that 3D, shared experience translates to portable devices as they currently stand. In the development process, we had studied the possibility of introducing stereoscopic 3D feature to NGP, but decided not to install it. After careful consideration of our goal of offering users the ultimate portable entertainment experience with a revolutionary user interface we have decided to focus on the features and specs announced today first.” - Sony Computer Entertainment Europe boss Andrew House
Obviously a bit of a knock at Nintendo for the 3DS. Sony thinks 3D is a shared user experience, with multiple people enjoying 3D content in the same living space. That sounds like a great idea, until you add in the need for a 3DTV and 3D glasses for all. A single-user 3D experience without glasses sounds like a lot more fun to me.