You all might find my book and online course about the future relevant: http://www.possiblefutureworlds.com. I referenced Peter Thiel's book and actually met him at his book launch in New York at Columbia. He's impressive and thoughtful, to say the least. I've also exchanged some emails with people involved with Project Hieroglyph.
I think that the Bloomberg article gets both books wrong, simplifying each authors' notions of the future. They both attempt to stimulate us into thinking about possible futures that no one else is thinking about, either because we are biased against the fanciful, we are too consumed with making money rather than creating value, or that we no longer dare to dream big. It is not that incremental improvements in technologies add no value in Thiel's case or that space elevators themselves should be the goal of humanity in Stephenson's case. However, a large number of copycat competitors will not steer us into a fundamentally different and better path, and not daring to be audacious will prevent us from achieving something extraordinary. In short, people today are letting the good be the enemy of the great.
Of course there are two valid visions of the future that we could hope for. One that takes what we value presently and improves upon those values. Or one that creates new values and expectations that hopefully fulfill our old values. Both are attempts to expand the frontiers of humanity. So it makes little sense to me to say that one is wrong or the other is right. The future will be whichever we want it to be.