so you just need a little bit of energy to change colour and absolutely no energy to hold it. so it's bi—stable and, as an engineer, that's a wonderful property to have. the driver can manually choose to change colour or you can do it via the sensors that are embedded in the vehicle. so you can have a temperature sensor, that when it's hot, the car will be white, and when it's cold, it'll be black, or you can have a light sensor so it changes colour at night time. so, there could be an actual purpose, apart from driving around wrapped in a copy of war and peace. and finally, here's a car that wants to use its power to post on social media. this is the indi one, and it's very keen to show off its supercomputer. it's capable of high—quality mobile gaming and even has vr connectivity, not that that's much use to the driver whilst driving. its power also means it could be very productive for work on the go. this car isn'tjust