Aye,
Or a place to put the wipers (at the sides of the screen )
The wipers are so low profile on those cars ^
Also i dont really know if it needs to have the wipers sat there, as the trailing edge of the bonnet is already raised and there is a big step from bonnet to screen , height wise.
Regarding the greenpeace twingo :
I wonder how well the twingo's wiper works? surely it leaves the bottom corners un-wiped? Thats more hazardous than the top corners...
Also does where the wiper drive attach , not look like it may increasing the frontal area slightly above the car( might just be photo angle )