Not content with just stuffing a card full of ROMs inside the old-school Atari VCS case, one modder installed an LED screen in the cartridge bay that allows the operator to cycle through and select games.
Hack-a-Day says the console has "somewhere around 1200 ROMs" on an SD card inside the case. With the three switches on the front, the user can cycle through them and then flash the title over to the EEPROM inside. The display's size is 2x16.
Atari 2600 Mod Features LCD Selector [The Bits, Bytes, Pixels and Sprites]