[delayed]

Yes, but I guess that some people could pedantically argue that a human kind of one billion people living only in a few acceptable areas will have a median standard of living much higher than a human kind of eight billion people spread all around the world. After all, all those millions of displaced people are going to die of old age and their pains will go away with them /s Sarcasm apart, we don't really care much about the pains of the people who were displaced millenia or centuries ago. That's history.

The point of view changes according to the sets of people one belongs to while still being alive, eg living in a warming Denver or attempting not drown in NYC?

Yikes, might need to send you back to the books to see what happens when a large number of people are displaced all at once.

Look at America/Trump right now with economic immigrants alone. This caused half the country to go "Yea, locking up people in cages and letting losers with guns shoot whoever they want while supporting an authoritarian regime is perfectly ok". Just what do you think it's going to look like when the numbers are 10x that from inside the country alone (a huge amount of the population lives close to the ocean).

Advanced technology has nothing to do with wealth equality and with the costs of making said technology it may be even further reverse correlated in the future.