> where are all those great things that were created with them?

You will have to wait great amount of time for great things just as you did before.

LLMs are not AGI, if so they are not foundational technology, if so we can't really built upon them - we can just use their wrappers as productivity tool, if so we will be bottleneck by what we were bottlenecked before: corporate bureaucracy, slow physical world innovation pipeline, supply chains, just a small number of actual problem solvers/risk takers around, etc.

There will be of course a lot of attach LLM wrapper and improve productivity here / there underwhelming weak fart products, ex: Meta Muse.