It is very true when people say nothing changes. It is almost as if the great changes are so fundamental they happened a long time ago and now we are left with cosmetic changes that people think carry vast amounts of significance difference, which they do not. So the difference between the wheeled cart and an airplane is that of speed, not that of the idea that a human being can travel further than they could in one day just walking.
The huge differences, that of a hunter gather to a farmer and of a sudden realisation that scientific method can unravel what for thousands of years has been the unknown, have been taken. Will space travel, floating cars, dual gills and lungs or other genetic modifications make any difference to who we are in the future?
There is one sphere of research that will make huge differences and no one can guess what they will be, though I am sure some writers are enjoying thinking about it. Brain research. Here we have a field of knowledge barely ploughed, and one that will go to the heart of everything we are. When they begin to make changes to our brains they will be making the first fundamental changes to the human beings since the emergence of settled tribes into countries.
I better get writing.