the deep dashes are necessary to make the concept bus appear to have a
snub-nose similar to the old microbus.   Otherwise, the hood would stick out
as much as a eurovan and everyone would complain it looks like a chrysler
minivan.
Could you imagine if the New Beetle didnt have a deep dash?   then it wouldnt
have that beetle shape.

less of a windshield = more of a hood and less of a resemblance to the rear
engined vw retro look.

think about it.

chris