http://www.bostonglobe.com/arts/television/2013/10/09/wonderland-down-digital-rabbit-hole/6miO5kwP0yHGmxkIw3tvDK/story.html
What happens when a movie becomes 100% CGI? Then its just another cartoon albeit a digital one.
Live_action provides more depth & interaction between the digital world & some real people & things.