The bottom half of the 3DS is populated with a touchscreen display (not 3D-capable), what appears to be an analog stick that Nintendo is calling a "Slide Pad," as well as a standard directional pad and action buttons. There's also a gyro, a motion sensor, two camera lenses for taking 3D pictures, and the new console compatible with DS games. Wi-Fi features were emphasized during the event, such as the ability to automatically seek out hotspots or other 3DS systems.
Software partners are aplenty, with Activision, Atlus, Capcom, EA, Harmonix, Konami, Sega, T2, and Ubisoft all supposedly working on projects. Games and franchises include Kingdom Hearts, Saints Row, Metal Gear Solid Snake Eater 3D, Madden, FIFA Soccer, Ninja Gaiden, Resident Evil Revelations, The Sims 3, Batman, DJ Hero 3D, Assassin's Creed, Ridge Racer, Professor Layton and the Mask of Miracles, Samurai Warriors, Battle Giants: Dinosaur Strike, and Hollywood 61.
We haven't spotted anything in the way of a price or release date.