When they say things like immortality may be achievable (To what metric with what consequences? Who knows) by 2080 or some shit I don't fully doubt it. People tell me that it will never be possible but look at what they're trying to do with CRISPR.
I see what you mean. But if you ask me you're ignoring the countless of stuff which was predicted or seen as a possibility but which never happen or at least not as how it was predicted. Like nuclear cars. People living in space (remember 2001 Space Odyssey? People really thought this to be a future for us today) and a lot more stuff. I mean look at the whole 1950s idea of the future where they thought we would be living in a sort of paradise today with robots, transportation and everything nuclear.
Imagine that during the 1920 or so they also thought most humans today would work what? 3 or 4 hours each day? And the rest of the time they would spend with fun and even lazy activities because productivty moved so rapidity economists back then believed no one will need to work anymore in the future. But look at us now ... in some cases people even work more than just one generation ago to achieve similar results.
So with saying this even if something seems possible on paper that still doesn't mean that it will happen. Some changes can happen in just a relatively short period. Like the change from Horses to cars - but that was kinda in development for quite some time. But other technological changes might take generations. Particularly when we're talking about space travel. Because frankly it is that complicated and difficult to achieve. Even if we're only talking about own solar system. I mean imagine if earth would see a nuclear war in 50 yerars right before someone invents a really good engine for space travel. What would that help? Nothing. Because then people would be thrown back as whole civilisations collapse.
I honestly don't expect any meaningfull space travel in our generation. Maybe not even the next one. I serously doubt people will enjoy their honeymoon on Mars in the near future.
Ever since the industrial revolution, we move much faster than before. I don't think we'll always get the things we think we will but more of them will come true than you think and sooner than you'd think.
Maybe 20 years ago I would have agreed to that. But now I am not so sure anymore. Because what we're not looking at here is the ever growing need for energy. And the faster things "move" so to speak, the more do you need it. And it's exponential on top of it all with I think energy needs almost doubling every 40 years or so? There is a clear physical limit to this though. From a technological and environmental point of view.
What we've seen for the last aprox. 70 years was a constant increase in almost everything. From cars, to houses, food, products, electronics. Everything needs more and more energy and resources. So this technological evolution which most of the time happend in areas of consumerism (economic growth) even stiffled innovation. Where have we seen some real innovation in the last decades? Even universitiese and reserarch is more often than not formed around the idea of "how can we market that shit?".
There are clear physical limitations to this kind of develompment. And it seems that we're getting very close that. You can't expand trade, consumption, production etc. without limits. Be it either due to the destruction of the environment. Or well the people not putting up with it anymore.