You argue that Computer Generated Imagery doesn't always look quite real. This is true but then again look at puppets and other filmmaking tricks. How often do they look fully believable. Almost never. Digital Animation is real far more often. Which is why filmmakers have pretty much abandoned hand drawn, stop motion, and wire animation. Digital technology made a live action Lord of the Rings movie possible. Why was it never made before no technology. Hand drawn animated movies of the past have always had the best imagery because there are no limits. Digital technology gives the same limitless feel but with photorealism. There is no such thing as to much CGI.