I wonder if at that point people will rightfully lose confidence in the authenticity of digital media, or if people are doomed to believe what they see...
I live in Japan where Instax instant camera are super popular. Fujifilm makes more money off of making and selling Polaroid-style analog instant film than any single other business. The Impossible Project is cute and fun for hipsters but Instax has been there making film all along.
But they realized that young women today aren't happy how they look, and they want to use Instagram-style beauty filters on themselves, so they started selling Instax Bluetooth printers. They take analog instant film cartridges, but they use an LCD to imprint the photo onto them. So now you get the nostalgia of Polaroid photos, but you can edit your face as much as you want. Is this digital or analog?
It's just blurry digital. The polaroid film is acting as a really lossy medium for the digital information. Look close enough and you will likely still find artifacts of digital photography in the "film" printout.
That way, you can set up a chain of trust, to track where some information is coming from.
This works as long as there is at least a top level signature provider that is uncorrupted. That will be hard in authoritarian societies and maybe even harder in radically polarized societies. Imagine a world where the CPP, DNC and GOP (and others) each controlled their own CA's, and had the ability to present a fake view of reality to their supporters.
Which can easily omit things they did say but wish they hadn't.