Which Science Fiction Visions of the World Tomorrow Will Come Closest to the Actual Future?

Colossus the Forbin project or Her. Super intelligent AI takes over global defence system.

A vision of the future becomes obsolete when the technological or sociological forces in fiction are superseded by those in reality. or when developments are called incorrectly.
 
I think we are overoptimistic in general when it comes to technological development. For example, I'm sceptical when I see deep space travel projected in just a few decades. I think the most staggering developments in, say, the next fifty years will come in the field of biological sciences. Specifically, I wonder if immortality is achievable based upon ever increasing developments in genetic engineering.
 

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