how big movies are made better

Here's an interesting article I found on Gizmodo about how some of the bigger Hollywood movies are transfered to 70mm film to be shown on the IMAX. It's an interesting article, and offers a few tidbits about IMAX and how it differs more from traditional film making than just having bigger film.
http://gizmodo.com/5250780/how-regular-movies-become-imax-films