Maybe the rate at which we manifest things is slow because we think time is real... I honestly don't know yet if this kind of stuff could happen quickly without technology, but some of these authors and yogis seem to think so. I guess the whole premise is that we have the power of creation where if we can gain understanding of the laws of the universe we can perform miracles disregarding time. All these spiritual teachers reference the Now, that there is no actual past or future, just Now, and the Now is timeless meaning there is no future or past, just memories and imagination.

Nanotech could get crazy though, I've thought about it a lot while brainstorming sci-fi stories to myself haha