Stop it. Your pastry is doing too much. If you want a donut, have a donut. If you want a croissant, have a croissant, dumbass. But you absolutely do not need this unholy bakery chimera for any reason at any time. We do not need food to do gimmicks.
Thermoelectric generators probably won’t eliminate the charger for your Apple Watch, but for smaller, screenless wearables, the heat constantly escaping from your skin could fundamentally change how we power our devices.