Potentials and limitations

A potential for 3D modelling and animation technologies and techniques are like if an actor dies half way through filming a movie, they can use CG to finish the movie. For example-Paul walker in fast and furious 7.
"the filmmakers will use body doubles, CGI, and Walker's own voice to keep his character in the film to complete his storyline. The late actor's face will be digitally added to the body doubles and his voice will be used for the dialogue."

This is a really clever idea as it means the film can go ahead, even though the actor died. Some people may disagree with this or find it disrespectful, but what are you going to do? just cancel a movie that everyone has been looking forward to or working on and spent a lot of time and money on? If technology has the potential to help us out in this situation we should use it.