There's nothing quite like the feeling you get when you're behind the wheel of a roadster with the top down. There's just something about driving a two-seat convertible that feels so pure and right. Almost all of the roadsters in production today are petrol-powered, but these concepts indicate a shift towards a greener method of propulsion. These electric roadster concepts also represent a big step in the evolution of the EV. Most EVs today are designed as boring hatchbacks or sedans, but these concepts buck that trend in a big way.