Well, to be honest, I believe this is the dawn age of human civilization. That is to say, in the distant future, say a few billion years from now, humans will look back at us in much the same way we look back at stoneage cave-men. Probably the difference between our future descendants and us will be greater than the difference between us and the cave men.
That said, I believe that the future (or some futures) might hold great things for the human race. Among these...
1) Space travel - between the stars, perhaps between the very galaxies.
2) Time travel.
3) Inter-dimensional travel, or travel to other universes.
4) Re-fueling the sun, or settling on the planets of a million different suns.
5) Altering the past and future to 'suit' the human race better, thereby 're-shaping' the universe (manipulating reality itself, into what WE want it to be).
6) Perhaps a merging of the entire human race into one gigantic super-intelligent being (I'm not saying this is necessarily a positive development, but if the suppression of individuality apparent in our civilization today continues unabated, it's a possiblity, yes).
Note that I'm not arguing that any or all of these things will happen, but considering the timescale involved, it's definitely a possiblity that our far distant descendants will have the technology and the power to do one or more of these. I do believe that this is the dawn age of the human race, and I think it is a tribute to us that we can even wonder about what such a distant future may hold.
Lastly, in all humility I must say that I am probably completely wrong, and that the technologies of so distant a future are probably as difficult for us today to visualize and understand as our modern technology would be to a cave-man. In other words, whatever I have put down above is probably the creation of a limited mind, and the distant future might surpass that in ways we have not (or cannot) even consider.
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