Lets hope the primary uses are entertainment and maybe communication. It will soon be possible to create a realistic video of anyone doing anything.
On the other hand, it has been possible for an extremely long time (millenia) already to create text of anyone doing anything, and in general it seems we can still trust text mostly (and can distinguish somewhat well between false and reputable textual sources), so maybe it's all reputation based, also for video in the future.
> But no federal law criminalizes the creation or sharing of non-consensual deepfake porn in the United States. A lawsuit is also unlikely to stand up in civil court.
https://www.wbur.org/endlessthread/2023/06/23/deepfake-porno...
> ... if someone makes a deepfake or otherwise posts a nonconsensual video of someone who does sex work, the defense could argue that because the woman’s reputation already involves sexual activity, her reputation is not being defamed by another video of sexual activity. Such an argument — and thus pursuit under defamation as a whole — would be missing the actual point, which is the violation of consent.
https://www.cyber.forum.yale.edu/blog/2021/7/20/deepfake-por...
This won't be regulated away, it will happen and everyone should be educated and prepared. That's just an unrealistic dream though, enough people will get fooled (I will probably be among them at least some of the time) that it will have consequences. Deepfakes have been used for scams for years already: https://www.youtube.com/watch?v=vqr0oER03SE
The situation is very similar to CP, and should be treated in a similar fashion.