Christopher Mims on developing for Android devices:
>Developing for such a wide array of device screen sizes and aspect rations means that not only is it impossible to create pixel-perfect designs for Android interfaces, there isn’t even any guarantee that a given interface can be scaled to fit a particular screen.
A nice read and a follow-up to this [piece](http://android-gripes.tumblr.com/post/4547554787/why-do-apps-look-worse-on-android-than-iphone-a).