Android is only outpacing because the iPhone is only on AT&T. Once that exclusivity goes away, it won't be outpacing it any longer.
And I don't know what you mean about stagnating. There are more and more HTML5 sites every day. It's only getting more abundant.
And Flash still blows ass, even on Android phones. It's not like you can even watch Hulu on it... you have to buy an App, even on Android.