Nothing really ground breaking. Extensive carbon fiber use has been around the exotic car world for the better part of a decade. Tops speed is downright slow, at 180kph. 0-60 is fast but I don't think those are real world numbers. Their is certainly a number of cars out their that could do a 3 sec 0-60 run but not with street tires. Traction just does not exist to plant the power.
Not to mention for $500k+ I want a V12 scream and couldn't care less if it used racing fuel and got 1mpg at that price.
Environmental and economy are just two words not used with these cars.