I am not a huge fan of 3D, primarily because the only 3D I've used rely on glasses. This doesn't work very well for a near-sighted individual such as myself since for me the wearing of two layers of lenses reduces the 3D effectiveness. I would have opted out of a 3D attachment for the GBA only because I never really had too many GBA games. However it doesn't really surprise me that Nintendo was thinking about such technology for a long time. The NES had internet connectivity, or rather the Famicom did. It is surprising that the Gamecube had 3D tech in it. In the end I'm just glad that all these years of experimenting with new technology has resulted in the 3DS.