We know Google is at least doing a similar stereophotogrammetry technique to dynamically render the world in 3D... they talked about it coming soon to iOS during their presentation in June, "The Next Dimension of Google Maps" (http://www.youtube.com/watch?v=HMBJ2Hu0NLw). Though upon rewatching, they might have just been talking about Google Earth.

No sign that they were porting over Navigation to iOS.