Prediction #21 from @ZviMowshowitz's post On AutoGPT:

The first popular online Sims-Westworlds, settings where many if not most or all non-human characters are agent-LLMs, will start coming out quickly, with early systems available within a few months at most, and the first popular and actually fun one within the year even if underlying LLM tech does not much advance. There will be lots of them in 2024, both single player and multiplayer, running the whole range from classrooms to very adult themes.

Edit: Some clarification, it must be an interactive graphical video game. Agent LLM NPCs means not just LLM generated NPC dialogue but where an NPC's actions are determined by an LLM, such as an internal LLM monologue which is not visible to players.

Popular is defined as more than one high quality game available, with multiple media articles noting the popularity of games of this type.