If apps and content are developed on OSX then they will be first-class citizens on iOS devices for end users. If Apple gives up on OSX to milk revenue from iOS, what happens when the hottest new apps and content are second-class citizens on iOS devices because everyone is developing/authoring on something else?

Apple's long term strategy absolutely relies on OSX, if current management are taking a short term view, well it wouldn't be the first time. Only there is now now Jobs to come riding to the rescue.