[rbanffy]

> Layouts basically don't let you layout out things on a pixel basis

It's a natural approach when you have devices with different screen resolutions and sizes. Pixel-based layout works well when all devices have the same screen size, but break horribly when they don't. BTW, I'm curious on how the iPhone 5 runs iOS 4 apps.

[cycle]

Layouts also do not let you place views over each other. So there is also an assumption of a flat, non stacking space.