ET Population growth will continue at extraordinarily rapid rates, far beyond what most individuals believe. That is that population plateaus at double the current 6 billion within the next 50 years. My thinking is that in the next 1000 years, it's likely to reach 60-90 billion. There is plenty of room on this earth of ours. It was calculated a number of years ago that the entire earth's population could be brought inside existing buildings and structures in New York City and it wouldn't be any more crowded than a New York City cocktail party.
Population density is another problem.
There is a pessimism and it's been around for centuries that we won't be able to feed the world's population and that's sheer nonsense. We are talking bio metric applications, including identification of occupants and a central computer's response to that person's every whim and need, including selection of background music, full wall screen artistic projections, the dimming of lights on command, and optic identification, which can be times keener than fingerprinting. The opportunities for customizing homes to respond to the occupants whims and desires is already here. The problem is cost, it's too expensive. Plus, some people aren't comfortable with such a change.