“The Wizard of Oz” is certainly the right movie to face the great and powerful ambitions of Sphere, the most expensive entertainment venue in Las Vegas history. Since 1939, the treasured classic has hailed the awe of gazing into a glowing globe, whether it’s glinting atop a fortune teller’s table, transporting the meddlesome Glinda the Good Witch or spying on a teenage girl and her companions like a sinister security camera.

Special effects are central both to “Oz’s” appeal and its plot: The big reveal is that technicians, not wizards, pull the levers that make an audience gasp. For Sphere — officially, there’s no “the” — those tools include three football fields of bright 16K LED screens that curve around its domed interior, with another 10 on the outside that light up Vegas day and nigh

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