Pro users are a more diverse group than just app developers. My impression is that app developers are not the ones who feel poorly served by Apple's current hardware lineup[1]. Which is not to say that app developers don't have other legitimate grievances with Apple.
[1] I know, I know; the disappearing of the escape key and the function keys affects everyone! Whatever will we all do?
The App Store has millions of apps. Who created those apps, if not pro users? Without the App Store, who would buy iPhones, iPads and iPods?
If Apple shit on the pro users they shit on themselves.