Sure there is the physical drive around stuff. But if you look at the C3 stuff (the company Apple bought that turns satellite images into 3D views) you can see where they might go with it. Also they do have a ton of cash and it would be seriously less than half a billion dollars to take a picture of the world. You might even get Toyota to make the 'steet view' edition version of the Prius in quantity.
The key thought for me here is that if this report is true, then Apple has decided mapping is strategic and taken it in house. And like Google (who did this in part so they could offer turn by turn directions [1]) they could exploit data they own for a wide variety of purposes.
[1] The original sources of Google's map information did not include a license to use it for turn by turn as that was exclusively given to another company by the vendor. Google had to acquire their own data without those restrictions in order to do navigation.