If you try to derive things from the past, then the only logical conclusion that you can arrive from that is to expect things to stay the same as the past in the future.
If you say that the future will be different from the past, then that will be a conjecture that is not based on anything from the past. It may be a continuation of the past, but the conjecture was not derived from anything from the past. It's a completely new conjecture that has never existed before.