I watched this AI npc in Skyrim and the level of interactivity it brought is amazing. So often in games characters quickly run out of lines, and feel like dead mannequins in open world games. Having a game world where there are lasting consequences because NPCs remember what you did is going to be cool. As opposed the same lines being recycled over and over.

This is something I've wanted to try. I still want to have with people but I can't always. I think it could help me flesh out a campaign too.