Art. Lebedev Studio had a line of keyboards with OLED displays on the keys, which were reprogrammable. It's more of an design project rather than a mass produc

Art. Lebedev Studio had a line of keyboards with OLED displays on the keys, which were reprogrammable. It's more of an design project rather than a mass produced product, but they did sell a number of these really expensive keyboards[1]. [1] https://www.artlebedev.com/optimus/ https://www.artlebedev.com/optimus/