actually it would hurt apple, because different sizes means different resolutions, which mean more work for developers.
Apple treasures its developers and they're smart on doing so, they give them enough time to work on things and by having less "resolutions" to work on they don't have to bust their butts off, and because of that apps are better and therefore iDevices are better.
i know that many of us don't think about all the problems that a bunch of different products would create but if you bought an android and half of the apps crash you would realize how great is not to have to worry about which apps works and which don't.
You don't get it.
If a pixel can be represented in a larger or smaller physical space it still means the same thing and conveys the same scaled proportions.
If you go off about some ridiculous "fragmentation" BS I will LMFAO
New panels are being made. We don't live in a tech world bound by what was possible last week in the headlines.