Using a Gameboy as a computer for an appliance sounds like a quirky solution, but I can see a lot of similarity with products sold today. For example, many new effect pedals for guitar have an accompanying Android/iPhone app, which connects via Bluetooth and controls the settings of the effect. The problem it's solving is a bit different: the pedal has room for a small computer in it, but not for a screen. Effectively, it's using the smartphone as a screen to save on cost and space.