Space stations are not about hard technology. They are about bringing along supplies like food, water, and ecosystems so people can survive. It is a poor analogy. You don't build PanAm spaceplanes when you can only live in a place for a short time. This is the failure of the hard analogy. A massive spinning station is not useful without a regenerative life support system, IBM Watson has nothing to do with biology. The existing techs in the 1960s are a far cry from regenerative life support. It is actually not why we don't have space stations in 2001. Ecosystems are not military in nature, they are not rockets, and do not act like Cold War technologies or computers. Computers might be used to model ecosystems, but it is advances in biology, not rocket engines that limited access to space. In the 1950s, there were nuclear thermal rockets which could take us to Mars. The problem was the supplies and life support, not the hard technology. It is not until recently that people started building remotely useful space greenhouses and regenerative life support. Also, it is the ability to use resources in situ that will determine colonization, things like 3d printers to make houses and tools, and self replicating solar power fields weren't even discussed at that time. In addition, the life support systems will have to be built from compact sources, seeds, regolith, earth, stored water and other resources. If you extrapolate from 1960-1969 you miss the boat, because it is ultimately biology and automation that will determine long term space survival.