Check this post A strong argument for why iOS development is winning
"IOS platform competitors take note: Fledgling indie iOS dev Chris Eidhof has posted a smart list of the main reasons why a new developer finds Apple’s mobile operating system such an attractive prospect. Eidhof, who is in the process of developing his first software for Apple devices, broke down the appeal of iOS using six main points." (from TheAppleBlog — Apple and iOS News, Tips and Reviews)For me the biggest resistance, as a developer, to iOS is that I have to learn a new programming language (Objective C) and it's tools, traditions, and bugs. And no one on the planet other than Apple uses Objective C.