> Now I know you get tracked by the celltowers anyway

Yes, but theGoog doesn't own that data. By having all of theGoogOS devices scanning and reporting back directly to theGoog, theGoog gets that data for free. Plus, all of the other info it can hoover up that the cell towers would not have access.

Google 100% was wardriving and all of your other items.

However, you can increase gps accuracy using wifi. GPS is not that precise (part of which is government regulations) and WiFi does help immensely with accuracy.