The point is that it does not matter when any tech is ready or possible if there is no political will. There is none now and until that changes in a big way it will never actually happen. And the new tech to do that will not come from the US until we have a decent educational system again ... and again, there is no political will for that either.
Don’t get me wrong I’ve been looking for some thing to happen for the past 60 years. Until there is a drastic change, the US, for one, will be contemplating its collective navel and the Kardasians ...
Without political will things will change more slowly. But they will change.
Most of the technology will come from the USA. But other countries will contribute.