[aerohead]

I agree on your three points.A number of cars have used the abbreviated roofline over the decades.The "indent" shaves a little frontal area off 4-seaters,where there will be no need of headroom in the center.The rolled edge offers stiffness to a thinner (lighter!) sheetmetal panel,and the whole package provides an evocative "look".I think its intelligent design and one of the small details stylists can capitalize on.