Armchair analyst warning! What duopoly? I only see Android, Android and Android from here. iOS's worldwide market share is already less than 10% in late 2015. While forecasts right now tend to say iOS will remain at this level of market share even until 2017, they seem to ignore than on 2011 most forecasts predicted that by 2015 Android and iOS would be on equal footing. My prediction: less than 5% by 2017. In no part because Apple will stop centering on the phone market and move on something else. My reasoning i that the smartphone market is already terribly commoditized (current market leaders basically all "cheap copycats") and Apple doesn't work well there. It just shows how biased we are.