"I think at Nintendo, we realize that any sort of goggle-type 3D technology was not going to work," 3DS hardware producer Hideki Konno told CNN. "In order to make 3D technology viable with video games, we thought we needed to have glasses-free 3D." Konno and his team at Nintendo did experiment with a 3D display tethered to a Wii before development of the 3DS began, but purely as a proof-of-concept for glasses-free 3D.
Echoing Konno's remarls, Nintendo of America president Reggie Fils-Aime told CNN, "Glasses-free is a big deal. We've not said publicly what the next thing for us will be in the home console space, but based on what we've learned on 3D, likely, that won't be it." It probably won't be 4D either -- that's been done.