Sorry, but some of the points you make are just plain wrong.
China, S. Korea and many other Asian nations are extremely close to following Japan into absolute population decline.
Also that airports are in fact multiplying like fleas in China; Japan is just one big airport when you call them up on the "MAP" screen, etc. etc.
However the major point is right on the button, and one that I have tried to make before -
the A.net forums are overwhelmingly focused on Europe& N.America, and show little understanding of the reality
of exploding middle-classes in Asia (read "future airline passengers"!).
I have tried to throw-out thoughts on what it might mean, but, sadly have so far been mostly wrong.
the 787-10 type of solution looks perfect for Asia but so far is gaining few takers.
This is despite the fact that my 40+-years of travel in Asia & (luckliy) a happily long list of Asian girlfriends has taught me that many if not most Asian people want to travel ---> within Asia!).
So your thoughts on what it all means will be appreciated.
Taking all the trans-North Atlantic hate-stuff away just for a second, it does seem to me that the reason there is so much dissension is that the case is really finely-balanced.
It is not yet clear, and really could go either way.
(That is, all the partisans in EACH camp can find a compelling reason why they are obviously right and their opponents
are clearly bozos, if not worse.)
So, from the top:
A) The idea that congested airports/airspace/etc will be solved by bigger & bigger aircraft operating fewer flights is clearly not stupid.
B) Similarly the idea that people would prefer to avoid hubs & intermediate landings by taking a direct flight is also clearly not stupid.
C) The A380 has not (YET
!) done as well as hoped .... but it is equally NOT an obvious failure.
It certainly could have a stronger future with just a bit of luck (both it & the B747-8i have suffered from the North Atlantic Crisis - which never was a GFC.)
My two cents?
D) Airbus will do the -800NEO, at least, and
E) Frustratingly, it will continue in the current "Not a Success but also Not a Failure" mode, as the coming world economic state is quite dark, IMO, and will tend to demand modest, cautious decisons on the part of airline decision-makers.
Which is not the best environment for the -800NEO (or whatever), IMHO.