Militaries using AI checkpoints, guards, patrols, and loitering munitions (from a Humanitarian / rules of war perspective, not necessarily existential risk). Possibly to continue regimes where human soldiers would defect or differentiate civilians from armed opponents.
AI-reinforced media bubbles promoting alternative realities (most people blame this on social media, but from QAnonCasualties it seems like YouTube and Facebook recommendations hooked a lot of people before mainstream companies assessed whether they could be harmful). I think this is more core than "deepfakes" because people believe even fake Tweet screenshots if it backs the narrative.