I don&#x27;t drink hot drinks myself, but I did look into a boiling water tap when refitting my kitchen.<p>They win on usability, though not on efficiency, since they keep a pot of boiling water stored at all times in a insulated container.<p>Presumably this could be improved by connecting them to the internet and having them turn off when your Nest knows your house is empty, or your fitbit knows your asleep, but start to raise the temp as people enter the house or kitchen.<p>They could also connect to a smart grid and vary the stored heat within some parameters to help balance the grid (kettle boiling contributed to some of the biggest grid peaks in the UK, during advert breaks in popular television events).