For better or worse, I think the future has to be showing warnings on images with no C2PA-like watermarking like we do for insecure web sites. Media can be signed by authors. If the Associated Press sign an image, I can feel more confidence in its authenticity than the next decade's InfoWars. Power users can still choose to ignore it, but standardizing UX around trust sources like we do TLS will save the less savvy among us.

I don't think we've even seen the full brutal force of disinformation that we are capable of yet.