There are many hubs, but that doesn't mean you'd want to fly an A380 into Addis Ababa Bole International Airport, Ethiopia. The big hubs is where the A380 makes sense. In the last 20 years the world economy has tripled. Tim Clark reckons demand for air passage will double over the next 7-10 years. The big hubs are already operating at capacity. A lot of smaller hubs will have to take the shortfall in capacity and grow.
The only way many of them can do that is by increasing the size of aircraft. Flights to London or Tokyo or the other big city hubs will be almost a premium business-class only deal. The people who has more money than time. The rest of us flying on proles/scum-class will have to be content with landing in smaller, outlying hubs and taking the train or other alternative transport into the Big cities. On most of Emirates' A380 fleet the entire upper deck, effectively half the plane is business and premium class only. Those are the seats (and suites and showers and beds) that make a lot of money for Emirates. The low cost carriers like Ryanair have already been squeezed out of the big hubs. They simply can't afford to fly there with their business model. Those airlines will want the 787 and A350, and those will carry more PAX in total, but mostly at low budget scum-class.
In the last 20 years the world economy has tripled, most of that growth is in Asia and South America. A lot more people are going to want to travel in the foreseeable future.