I agree with you in that mass media has been, willingly or otherwise, distorting the truth(s), but the easier and cheaper it is to "create fake information" the higher the verification bar for the public.
Right now, faking an interview via real-time 3d rendering plus capture of facial expressions would cost a ton of money. So anyone trying to do so would need (for e.g. to damage a competitor's reputation) both deep pockets and something valuable to gain from it (and would need to factorize the cost of getting caught, etc).
If this tech goes mainstream in the future, the cost would be so low that I can imagine some nasty things happening.
Hopefully there will be ways to detect this as this technique is further explored, so I'm not saying it's a "catastrophic development", but it certainly made me think more than just "oh wow, this is very neat!", which it also did by the way. It's incredible the kind of things researchers are able to achieve.