I am still thinking Tesla But any other IoT device that can keep cool enough during mining and not burn down should do. But, now is the time to get the systems ready for mass implementation. It is not yet the time for viable IoT mining on other devices than smartphones. But when it is doable in say 5 years (due to technical advancements) everything from the blockchain to the underlying (infra)structure, support etc, must be ready to integrate UPX asap on the devices that are fit for purpose then. This IS the time to get the technical stuff lined up and create some sort of plug and play thing for those devices. And in the meantime building up usecases on ecommerce.