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.
It's insane how much change we've seen in the past 13 years. I often wonder if it will slow down soon or whether we will maintain this crazy amount of progress and change. I think google is getting close to being capable of dying, but still not at that stage. I too wonder what 2015-2030 will look like.