Let's see if the press attacks it.In the past they've really beat up on this roofline with respect to rear headroom and outward vision.
When GM did the first
Citation concept car they eluded to internal criteria for outward visibilty as justification for the faster contour.This new roof would eclipse that thinking.
Interesting.Thanks!
PS,the Volt has an interesting sideview mirror.The stalk is more streamlined and the main body of the housing is moved well outboard,like Stingray.