Your logic is faulty, inselperer, consider the meaning of "imagine".

To imagine is to regroup pieces of the the known Universe into arrangements never before made by you and maybe not by any other man...at this time. We cannot imagine otherwise.

But to imagine that there will come things that will then allow us to imagine differently is not imagining the actuality of it but is only hypothesizing that we can't imagine the strange world ahead with our present set of imaginators. (I made the word "imaginators" up, but you known what I mean.)