Maybe it was missed, but in the beginning he said he was told the audience are mostly students about to enter the industry, so I feel like a lot of the talk is just establishing vocabulary, basic information about what LLMs are, analogies to get people to wrap their head around where in the workflow they can fit, and so on.

So while most of it seems obvious or relatively abstract, I think that's because of the target audience of the talk. I had that lens while watching the talk and while I cannot say my worldview has done a large change because of it, I understand it could be valuable to newer members of the ecosystem.