They are saying if they have say an iphone and an android (tablet?), the same app should behave the same. Contrary to you, some people could not care less about "consistency" of different apps that have different UIs and do different things anyway.
Yes, we have different interfaces on the web already, and nobody is complaining that the Gmail login button looks different from the Facebook login button on the web.
to be fair there are a lot of those people who would not shut up about "native" html and "use the platform". Anyone develops for more than one platforms knows that platform is always the first thing to be abstracted away
Where is this magical market that has an iPhone AND Android tablet? I would wager that ihat is a pretty rare user, and even rarer to be using the same native apps on both.
Do you want to advocate that everybody buys a single brand?
Or do you want competition in the smartphone space?
You know, where people can freely move from one brand to another if they don't like certain aspects of their current brand? Like how the free market is supposed to work?