Makes the interesting case that the age of really big ideas is gone - the sort of ideas that in the first half of the last century, were responsible for so much of our progress. The entire notion of ideas, in fact has been greatly devalued - unless they can be instantly monetized.
I think this is also partly because of the pervasive VC mindset that says "ideas are a dime a dozen, execution is everything...". We need big, bold ideas today more than ever before.