Tyler Cowen’s “Great Stagnation” is mostly a crock.
Just like with the Wright brothers, most important innovations are only obvious in hindsight. There is a long history of world-changing technologies being written off as irrelevant toys even years after they were developed.
There are several nascent innovations happening or about to happen that are going to change lives completely in the next 20-100 years, assuming technological society continues and all that.
This list isn’t comprehensive; I’ll miss many. But I can guarantee a few of these will come to fruition, seem obvious in hindsight but be widely derided and scorned as “playtoys” or “impossible dreams” now:
1) Lab-raised meat.
3) Widespread and greater-than-human AI.
5) Neural implants.
6) Uplifting animals to human-level or greater intelligence.
7) Genetic engineering.
8) Anti-senescence treatments and a general cure for aging.
I could go on. But some that will definitely change nearly everything aren’t on this list because likely even to me they look like inconsequential playthings or just don’t exist yet.