What if you died but your chatbot didn't know?
Maybe software running on your PC to capture everything you type, a voice transcriber that filters out your voice specifically and records that, and you've got a dataset that covers a lot of who you are.
Fine tune a model on that and boom, you're "immortal", and as LLMs get better and better, the fidelity of "you" gets better and better.
It's like home video on steroids