I havnt read the book yet, but based on the summary here (and for what it is worth), I found the jump from 1-5 under economic growth above to 6 a little unconvincing.

One demonstration of AI that I find impressive is that AI agents can now take and "pass" some intelligence tests. For example, AI agents can now about as well as a typical American teenager on the Raven's test of human intelligence.

Thanks for the nice summary and the questions. I think it is worth noting that AI is good only at some board games (fully observable, deterministic games) and not at others (partially observable, non-deterministic games such as, say, Civilization).