Nintendo's announcement that its next generation hand-held gaming platform will feature glasses-free 3D, once again places Nintendo in the forefront of technological innovation.  Time and again, Nintendo has pushed the technological envelope, reinventing what we think of as gaming.  Mario Paint, the Wii, Wii Fit, the Gameboy and the DS.  All of these products have taken gaming in new directions, unfettered by the preconceptions of established market.  3D, partciularly 3D without glasses, is a bold, innovative step that will help propel the company forward even as it faces new competition fr