It's been on the way for a while
As other posters have pointed out, this has been a theme in some Science Fiction stories. I remember something like this in the book Rising Sun by Michael Crichton in which a character was framed for murder by means of an altered video. There was also a Battlestar Galactica episode where Baltar was framed (by who, one wonders, exactly?) for tampering with the defense master computer on the eve of the Cylon attack.
Really can't see a lot of GOOD coming from this technology, except, as one poster mentioned, we can get Humphrey Bogart doing TV ads, if you call that good.
And it's easy to see a lot of BAD things coming from this technology. It's been years since "the camera does not lie" was anything like the truth, and this new tech isn't likely to really help.