Your perspective is refreshing, however it's worth noting that the automotive market doesn't have the same network effects as mobile computing. All cars take the same gasoline and oil for the most part.
Sure, you can buy Angry Birds (or whatever) again for $0.99 if you switch platforms, but will you buy all of your apps again? And what if you really like an app that's only on one platform?
Perhaps power users would rather not repurchase dozens of paids of apps; but for the average user, the amount of money invested into apps would probably be on par with the amount of money invested into a case for said phone.