The App Store featured apps rotate every week and it gives developers a lot more visibility that they would otherwise not be able to achieve, and if you write a high quality app you have a reasonable chance at getting featured.
But the fact of the matter is, simply due to the economics of the App Store, any developer spending the time writing a high quality app is going to want to ship on iOS first (generally on both the iPhone and iPad), and then port to Android later.
The only way I see this changing is if the app purchasing patterns of Android owners reaches the same levels as iOS.
Otherwise, why would you start with the platform that generates half the revenue of the other?