If you have ever tried to create mobile applications you may faced with a problem of choosing the right size of bitmap textures. In our world there are tones of devices with different screen resolutions even screen aspect ratios, for developer it could be cause of nightmare.
Starling documentation has a good post called
Multi-Resolution Development wich shows how to manage textures using
contentScaleFactor but the problem with quality of texture images remains. Many developers just create two different bunch of textures one for low resolution mobile devices and another one for high resolution tablets called "HD". In this case you will lose with size of application because you need to pack two bunch of textures, of course you can create two applications but even in this case problem with texture quality is not completely resolved.