They're wild, crazy and oh-so-luxurious. And they represent a vision of the future of luxury motoring.
Now Aston Martin has joined a raft of automakers, including Porsche, Rolls-Royce, BMW and Mercedes-Benz, in releasing new cutting-edge concept cars.
The concept models feature sleek designs and the latest technology, which include self-driving systems.
Flick through the gallery above to see the latest thinking from the world's most progressive car companies.