One counter-example : the console market. That might very well be because editors are sophisticated enough not to want a monopoly of either Nintendo, Microsoft

One counter-example : the console market. That might very well be because editors are sophisticated enough not to want a monopoly of either Nintendo, Microsoft or Sony... The same could happen in the smart phone space : mobile app developers might be sophisticated enough to try to avoid an Apple or Google monopoly. Or not. We'll see. The "smartest" in this area are the airlines : there is a reason why Airbus and Boeing market shares are so close from each other... competition is very very good for them, and they know it. So lots of big airlines go for both shops.