Post-scarcity is what happens when the current resources that restrict our actions are no longer an issue. There will be different bottlenecks for development but those resources are so far removed from our current concerns it is hard to imagine.<p>Imagine a world where energy is practically free, you might be tempted to think that spells the end of scarcity. But you still have to deal with thermodynamics. Your factory could be churning out countless diamonds with the free energy you are getting but you are going to need a large heat sink for all the entropy you will be pumping out. The scarcity then is your local ability to dump entropy.<p>Or imagine a reality where we create a Dyson Sphere and have super nano-tech and world peace is a reality. No more scarcity right? Those descendents are now competing with other space faring actors. They may be content to stay in our home solar system and wait for the sun to kill the species or wait for another actor to take our star. The new scarcity there is solar system redundancy.