In all this we see technology as the measure of change. Looking back 50 years to 1967 I see little actual change in much of anything. Yes, we communicate with more people over a larger distance via a wider range of connections and with more speed. But we still have the same range of ideas about politics, religion, society, and economics. And if we have the same ideas in conflict with each other nothing will really change. So. My vision of the next 50 years is:
1) If it can be done the rich will do it somewhere.
2) If the rich do it the less rich will want to do it to look like they are the rich.
3) If the less rich find a way to do it the merely financially stable will want to do it so that they look like the less rich.
4) If the merely financially stable find a way to do it, the barely financially stable will want to do it so they look like the financially stable.
5) If the barely financially stable find a way to do it, the financially unstable will want to do it so they look at least barely financially stable.
Since the number of people in each group is larger than the preceding group by a factor of 2, in order to maximize profits corporations will find a way to get each group in turn, to afford it. Thus, anything which can be done will be done by everybody.
Given this is the scenario of the past and of the future we can assume that in 50 years the technologies developed in the next 30 years will be in the hands of everybody (cell phones are the current example as you find them in all parts of the world, even the poorest).
Given that as the technologies develop to replace workers, those workers at the bottom the ability or skill levels will not be employed -- except as necessary consumers. Thus, the money to pay the lowest level of consumer will come from the upper classes via taxes, but the quality of the products purchased by the lowest level of consumer will be quite low and the gap between the quality of the top tier products and the bottom tier products will increase. At the top a person will purchase a device which links him or her to everything, anticipates what he or she needs at the moment, supplies it "just in time" and automates their entire life and work with that person's particular abilities "linked in" to the global system to create new and interesting products. At the bottom the same device will link the person to the global system and track their debt level until he/she is so far in debt that they can no longer be connected. Legally they will lose their vote, their home, and become the disconnected.
The population will stabilize around 12 billion with 80% living in "low rent" areas and the rest in physically isolated (read "gated") communities. Since transportation will be automated public transit will be for the "poor" and private transportation will be a privilege of the rich.
The gap between the 20% and the 80% will be, at first, along intelligence and creativity lines, but eventually the rich will simply ignore any measures of intelligence as they shove their sons and daughters into the jobs available to the connected, and then cover up their sons and daughters poor performance by purchasing whatever they can from whatever source they can. There will be a thriving trade in "black market IQ" performance enhancing drugs or even "stand-in" persons who were born in the 80% but have the talents to function in the 20% even if they don't have access.
These things will be mostly in the developed world as the rest of the world will be pretty much ignored and eventually cut off. Immigration will be a thing of the past except for the movement of the top 20% of the world into Europe, the US, Japan and perhaps a couple of other countries, maybe Australia and New Zealand.
China will be lost again. Why? Because the middle class of China will continue to grow artificially as China continues to thumb it's nose at basic economic realities and tries to continue it rapid economic growth. One of the most basic and fundamental rules of history is that economics always wins in the wind. Any government which artificially changes the value of anything for too long will have to pay the penalty for it's attempts. And that penalty, in China's case, will be a massive war that ruins them. As they continue to stumble (they have already started) and their economy begins to play the wild pendulum game (as they try to stabilize it without reforming it) the swings will mean vast amounts of those newly minted middle-class consumers will be returned to poverty and with that the leaders of China will find it necessary to find some way to avoid the massive revolt about to explode. To do that they will manufacture some foreign (external) threat and go to war. My guess will be against Russia as Russia has the vast resources needed to fuel the Chinese economy and keep the economy going at least for 20-30 years.
But since the war will not reform their economy it will destabilize it even more as they borrow from the US and other countries. If they war lasts more than a year the Chinese economy will never recover. If it lasts less than a year the Chines economy will not reform and it will not recover.
So the US, Europe and Japan will thrive under a vast socialist/capitalist hybrid with 20% doing all the work and the rest of us receiving "subsistence" allotments, while the rest of the world will be pretty much the same as always, a back-water, relatively primitive area of little hope or development. And China will join them.
AJ