Let’s face it:
Today we don’t live in the future we (or our parents) envisioned. Civilization was not eliminated or at least decimated by a nuclear war – at least not yet. TV hasn’t dumbed down all of society as predicted. But we also didn’t get our flying cars and there is definitely no big space station shaped like a wheel in earth orbit from which deep space missions are launched (as in 2001). I guess it’s a trade-off. In our everyday life we use so many things our parents never even imagined one could possibly have a need for. And maybe it’s a good thing those flying cars didn’t come out, they might be pretty dangerous under human control.

The reason the Moon is as far as humans went has become obvious lately: The race to the Moon was not about science but it was to show the Soviets and all the world that the US could do it. Considering that all the resources, manpower and money that went into that effort wasn’t spent on weapons was a good thing already. Maybe people started to think that there was so much good technology for everybody in the pipeline that they turned to SF and Fantasy when the goodies didn’t materialize. I guess our ancestors were used to gradual or no change in someone’s lifetime. The 20th century had so many projects and developments that were deemed impossible when proposed and then led to the wildest blooms. Aviation is probably one. At the same time human flight didn’t exactly start with the Wright brothers in the early 1900’s. The wish to fly seems to have been in human consciousness long before that. So, patience.

A little update might be in order:
Just a few days ago US president Obama canceled the Constellation program. This program was very much focused on going back to the Moon. It remains to be seen what happens now. It is hoped that private companies like SpaceX could provide launch capacity soon. Maybe that means that Bob Zubrin’s Mars Direct plan gets a closer look. Or how about Marshall T. Savage’s Millenium Project?