It's an interesting question how often we are really surprised by a change in knowledge or technology. I mean to the extent of being pretty sure about something or a possibility and this being proven false. It is more common either for us to start uncertain or for the difference to be less blatant.
Any advance that could solve chess will be hugely more significant for other reasons.
As an analogy, DeepMind achieved a huge leap in the performance of computers at difficult finite combinatorial games of perfect information (most notably go, but also chess), but far more significant is their applications of the same base technology (advanced deep learning) to the protein folding problem. The human race is little affected by the best go player being a computer, but there is huge potential in the new capability to analyse the behaviour of any protein (a sequence of amino acids) without spending a year or two in the laboratory.
I hope you live long enough to see it happen.
My name isn't Methuselah...