What use cases do you envision that go beyond the usual simple triggers and conditionals?

I could see using an LLM to set up more complex home automation rules that I am too lazy to set up myself. But for what kind of situations is it useful to have an LLM run the device directly?

That's way too much RAM to make sense, you could centralized it and run all home devices

I will never need or want a local LLM running in my light bulbs.