I hate to pooh-pooh it for everyone, but this was possible before LLaMa. GPT-J-125m/6b have been around for a while, and are frankly easier to install and get results out of. The smaller pruned model even fits on an iPhone.
The problem is more that these smaller models won't ever compete with GPT-scale APIs. Tomorrow's local LLaMa might beat yesterday's ChatGPT, but I think those optimistic for the democratization of chatbot intelligence are setting their hopes a bit high. LLaMa really isn't breaking new ground.