You raise a great point, but as far as I know, there hasn't been an Android device playing in the digital music players category. In the iPod market, it seems that the rest of the tech world just conceded to Apple.

From a pure economics perspective, what is called today 'open' and what was called 'IBM compatible' in the 80's, would always win a greater market share in the long term. It's a simple matter of supply & demand.