I just had a mini-revelation that this looks weird because the “pupil” is on the surface of the contact instead of under the lens of the eye. These aren’t bad contacts; contacts are just bad like that. Seems that post processing is really the only option.

It becomes useless as evidence unless you can establish authenticity. It just makes audio recordings more in a class with text documents; perfectly fakeable, but admissible with the right supporting information. So I agree it’s a change, but it’s not the end of audio evidence, and it’s a change in a direction which courts already have experience.