I think this is off. LLMs are severely constrained by hardware and we've seen at least an order of magnitude improvement in flops since ChatGPT launched. Over the next couple of decades we are likely to see that level of improvement in memory capacity. There's likely at least a few step changes left.

Regardless, the point of the GP that we saw revolutionary changes in society within a few years of technology introduction is off. It took decades for the full impact of the pc, internet, or mobile to be seen. We're still in a very early phase of figuring out how to use LLMs.