Toyota Prius Alpha - why it makes sense to build this compact van

Toyota has announced the Toyota Prius Alpha, kind of a compact van version of the Prius, similar to the Verso. This is a good idea. Anyway the Prius wasn't a pretty car, so changing the back can't do much harm. Also, the Prius always suffered from a lack of luggage space. With the bigger back, that should be at least partially solved. And finally, from an aerodynamics standpoint the high "Kammheck" shouldn't worsen the drag coefficient substantially. And families have been happy buyers of the Prius, with more space they will be even more happy. Hopefully the brakes work this time ;-)