How is Apple going to implement the larger screen in iPhone 5?

When Apple introduces the iPhone 5 with elongated screen, they probably have to do some justification to their choice in screen size and make it convenient for developers to keep making apps despite this "fragmentation".

Some apps are going to remain unaffected or require little modifications, e.g. messaging, video, phone, Safari, etc.

Screenshot20120410at011_medium

Screenshot20120410at011_medium

But some apps are going to have black bars in them, be it top and bottom in portrait mode or left & right in landscape mode.

Screenshot20120410at011_medium

via cdn3.sbnation.com (Source: http://www.theverge.com/2012/4/9/2937265/the-4-inch-iphone-5)

How is Apple going to justify their decision for the elongated screen? Because you know, when this comes out, everyone is going to freak out about Apple's demise due to this "fragmentation" and what not. Will they come up with a solution once-and-for-all that allows for developers to build on a variety of screens easily? I don't know about Android, but I think that's how Android developers make apps for a many screen sizes.