Remember NKK's Rocker OLED Switch? It's a unique snap-in switch with a programmable monochrome white PMOLED display (96x64) that is IP64 water resistance rated. User selection is based on menus visible on the display and multiple layers of menus can be achieved. The company now offers a development kit for $265 (or a kit with two switches for $315).

NKK Switches OLED Rocker