Nvidia's ACE is pretty impressive and opens the doors to some pretty cool things such as NPC's having their own schedules, Being talkative in the confines of the game world/lore of course, Even having a follower character who can intelligently help you like giving you ammo, Heal you, Pointing POI's out etc....
I'm hoping more devs make use of it and it's not just featured in 1 or 2 games as a minor showcase.