alt Hacker News> then what is their model?
My mental model has been 3D computer graphics: doubling the polygon count had huge returns early on but delivered diminishing returns over time.
Ultimately, you can't make something look more realistic than real.
I don't know what the future holds, but the answer to the question "can LLMs be more realistic than real" will determine much about whether or not you think the curve will level off soon.
The equivalent bar in this domain would be human intelligence, and we already have growing lists of tasks where machines outperform humans. We even known of natural systems that outperform humans on some metrics, e.g. bird-brains have higher neuron density than ours because evolution had to optimize more for weight.