At E3, Nintendo CEO Satoru Iwata displayed "Nintendo 3DS" device allowing players ability to experience 3D effects without the need for any special glasses. It'll feature a slider to adjust technology by maximizing or removing 3D content all together.
Other features include: 3.5 inch upper 3D screen; 3D depth sliders; Non-3D touchscreen on the bottom; Analog slidepad; Motion and gyroscope sensor; Integrated 3D camera.
Nintendo 3DS can communicate with other Nintendo 3DS systems without "knowing" and will support wireless communication between systems regardless of the game.
Nintendo announced a partnership with over 20 publishers to develop games for handheld console include: DJ Hero 3D, Kingdom Hearts 3D, Saints Row, Madden NFL, Dead or Alive 3D, Ninja Gaiden, Street Fighter IV, Ridge Racer, Metal Gear Solid, Professor Layton, and Samurai Warriors.
Nintendo has also paired up with Warner Brothers and Disney to bring three dimensional movies to the device.