Well, ChatGPT knows about the 90s Balkan wars, a topic to which LWT hasn't made an episode that I'm aware of, and yet I can ask it to write a script for a Balkan wars episode that reads surprisingly like John Oliver while being reasonably correct.
Essentially Carmack pointed in the slides that teaching AI to play game a, b or c didn't improve AI at all at learning game d from scratch.
That's essentially what we're looking for when we talk about general intelligence, the capability to adapting what we know to what we know nothing about.