there is a similar building in Jeddah on Medina Road, just next to York Salem showroom, somewhere near Hira street intersection. It also belongs to apple and sells only Apple electronic product. And amazingly there had been no public anger on that. Even interesting fact that Saudi gov isn't bothered at all and any building cannot be constructed without municipal approval therefore they are clearly aware of it. The point is that these mullah like provoke general public anger among Muslims to fulfill their personal interests.
Similarly, there are a few life size models of Kaaba somewhere in the Muslim block of former soviet union..and incredibly no mullah knows about it.
The point of such cuboid construction of apple showroom is just to tribute apple's elegant cubic designs.