It's always a treat to watch a Carmack lecture or read anything he writes, and his notes here are no exception. He writes as an engineer, for engineers and documents all his thought processes and misteps in the exact detailed yet concise way you'd want a colleague to who was handing off some work. One question I would have about the research direction is the emphasis on realtime. If I understand correctly he's doing…
It's because humans (and other animals) have enormous innate capacities and knowledge which makes learning new things much much simpler than if you start from scratch. It's not really because of human's computational capacity.
Hundreds of millions of years of trial-and-error biological pre-training where survival/propagation is the reward function