Imagine this: you're on your way home, it's a cold and wet winter night, you're dashing from the bus stop to your home and you want a hot cup when you get home. Just trigger the kettle to fill and boil enough for you with the app on your phone, and you'll be warm that much faster when you get in the door.

Maybe there's an autocoffee model, which makes your coffee to your preferences, and you get it to pre-boil while you're heading for home. Using the GPS on your phone with your average walking speed, it calculates when you'll be home so your coffee (or tea or hot chocolate) are just cooling to the perfect temperature when you walk in the door.

You may think it won't happen, but how many would use an autokettle? I wouldn't, as I don't often drink hot drinks, but my mother might because she won't have to hobble around. A blind person might, too, for a similar reason. People who prefer consistent drinks would - I have one particular friend who hates Starbucks but drinks there anyway, because it's always exactly the same.