James
TS Founding Member
The Harry Potter books has illustrations, yet Universal Studio immerses you with top quality themeing based on the films. Imagine what Harry Potter world at Universal Studio would be like if they decided to go down the route of using the original book illustrations instead.
That's slightly different though as Harry Potter has become one of the biggest franchises in film history, the films are world renowned.
Charlie and the Chocolate factory isn't really on that scale. I'm guessing they went with the book illustrations as they are more timeless (wise decision in my opinion). The film used for a ride would have become outdated very quickly.