In a note to clients -- as reported by "Fortune" -- Piper Jaffray analyst Gene Munster says the looming map wars (or perhaps that should be "reported" Map wars -- in which Apple is reportedly planning to replace Google Maps as iOS's default mapping app -- isn't likely to tip the balance one way or the other.

If Apple does drop Google Maps from the iPhone and iPad, Google will probably stick around, turning it into stand-alone app on the Apple App Store, the analyst thinks. Munster estimates that Google will generate about US$4.5 billion in gross mobile revenue in 2012 -- $4 billion) from search ads and the rest ($500 million) from display. He believes that iOS is likely to remain the biggest or close to the biggest source of that revenue, generating roughly 40% of the total (or $1.6 billion). Assuming Google keeps half (after subtracting so-called acquisition costs), iOS would generate about 2% of Google's total revenue in 2012.

For more info go to http://tech.fortune.cnn.com/2012/06/07/iphone-and-ipad-to-account-for-2-... .