There is one very very simple truth. Many will never believe right up until a technology is widely available.
No demonstration could convince them, maybe not even if they ran it themselves. And some won't believe even then, there are deniers and skeptics for everything, moon landings, holocaust, global warming. Does anyone doubt that we could be under water and still some would deny global warming. And skeptics are actually just believers in a certain concept of reality. Hence we can compare this with other beliefs such as shape shifting reptilian royals/politicians, Scientology, and religion etc. People will kill and die to defend their pathetic little beliefs in what is and isn't real. And skeptics are no more open to being wrong than the most fundamentalist true believer of anything else is. The only problem is that with people of a supposedly logical bent we assume their beliefs are malleable with reason and evidence, but that is true for so few, even few in what is meant to be a nest of believers in such extraordinary science. Since logic can be bent by intelligence to be used against truth. Real smart! (a statement that is true both sarcastically and literally). John