What 2600/7800 hardware was announced, but never released?
The short answer is quite a bit . Here are some examples: * 2600 keyboard by Atari, called the Graduate or My First Computer. It was designed by Peripheral Visions Inc. * 2600 voice command system * a headband controller, Mindlink * Atari 2700 – Remote control joystick/paddles, touch sensitive console buttons. * Atari 3600 – 10-bit system, made it to prototype stage. * Amiga Power Module for 2600. Similar to the Supercharger, it had dialup capability (to play against others). Also, some 3D games were planned for it as well. * U.S. Games Joystick, similar to Coleco Super Action Controller (EF May 83, p. 91) * 7800 High Score Cart * 7800 Keyboard, peripherals and computer games. The 7800 keyboard was designed by GCC Inc., the same company that designed Ms. Pac-Man and Jr. Pac-Man for the 2600. * 7800 adapter for the 5200 (!) (both a recent Usenet posting and Phoenix mention this oddity) * much, much more. Pictures of prototypes and the stories behind them for all three systems can be fou
