With the Apple TV 4K coming, Apple has promised 4K and HDR upgrades to existing iTunes movies at no additional charge. We’re already seeing that on 2017 iPad Pro tablets running iOS 11 — the key is that the latest 10.5-inch and 12.9-inch iPad Pros have HDR-capable displays. Check Settings > TV > iTunes Videos and make sure the Download HDR Videos switch is enabled. Then, in the TV app, on the Library screen, tap a movie to see its listing; you’ll see 4K and HDR badges if Apple has updated the film. The Verge reports that these files on the iPad are 1080p and not 4K, but they do support HDR. Regardless, they look great. follow link
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HDR Movies Now Available for 2017 iPad Pro Tablets