It always seems as if we're just 50 - 100 years from "the future".
Lost in Space takes place in 1997 when we were about to colonize space. Or as we know it, 21 years ago.
The original Blade Runner takes place next year. When we'll have space colonies and humanoid androids to work them.
And according to Star Trek, we've weathered the Eugenics War and have 31 years before World War III and the post-atomic horror. But in just 45 years, Zefram Cochrane will invent the warp drive.
Not to mention the countless flying cars we'll have as we go eat all of our meals in pill form.