If a computer model could produce the world's best porn, would that be a good or bad thing? Many harmful effects of porn would be amplified, but it would reduce the exploitation of real people in the industry. A moral question society will soon face I think.
I think the bad things would be targeted use of realistic images: for example, imagine the horrible things some people experience in school multiplied by “leaked” photos, or someone’s abusive ex distributing “proof” of their infidelity / unsuitability to have custody, etc. There’s a theory that over time people would stop believing everything they see but there’s still plenty of time for millions of tragedies before that happens, if it ever does. Forensics is going to be a growth industry.