It has nothing to do with prediction! Nothing! Let's NOT use the word 'prediction' anymore,OK? I used the word PLAUSIBILITY, now please, look it up in the dictionary before replying.
Imagine a Sci-Fi movie that is set in the future. The movie is set in a world full of androids doing all of our tedious and dangerous work and there are vast moon colonies inhabited by humans. The cars hover and genetic engineering has eliminated all disease. This is ALL PLAUSIBLE but not necessarily a prediction. It would also be plausible if the movie was set in the year 2900AD, but much less plausible, even ridiculous if it was set in the year 2008AD.