Who doesn't love The Wizard of Oz? No one I know. Rated as one of the best films ever made, this timeless classic has been released on various home-video formats no less than 16 times since 1980. Now, 70 years after its theatrical debut, Oz is getting its first high-def treatment on Blu-ray for the 17th iteration. I was fortunate to be invited to a press event celebrating this milestone at Warner Brothers' Burbank studio, and I learned a lot about what went into making this ultimate version.