Ya that is a good point. To be honest, I don't think it is inevitable that all of those companies will fall. But I think it is inevitable that their hegemony will be challenged. Of course, it is already obvious that Facebook's hegemony is being challeneged. And even Samsung is destabilizing Apple's hegemony in the smart phone market. Google and Amazon seem safe at the moment. But change happens so quickly that I wonder if I'll be able to say that in 2015 or 2020.