> I would not be 100% surprised if people in the future accepted things like 'ghost experiences' as normal things.

Even if the experiences becomes accepted (although i think it unlikely) but not necessarily as really being what people who believe in ghosts think them to be.

it is quite common for things to turn out to be real observations but not to be what the observers thought they were (e.g. flying saucers).

If militaries around the world are not using it, it is probably not real. See also telekinesis or ESP experiments the US Army performed [1].

[1] https://en.wikipedia.org/wiki/Stargate_Project_(U.S._Army_un...