https://www.cnet.com/roadshow/news/nissan-imq-concept-geneva-motor-show/

From behind, a large roof spoiler emerging from the glass roof is the most obvious design element. Nissan's typical "boomerang" taillight design has been reshaped slightly for the IMQ, and vertical character lines are specifically intended to improve aerodynamic performance. The car's lower body cladding is made up for black ridges called lamellas, which Nissan says are "evocative of Japanese traditional design."

As is often the case with show cars, there are several fanciful touches: cameras instead of rearview mirrors, a distinct lack of door handles and overstyled 22-inch wheels.