The 4K stage production of the National Theatre's War Horse claimed a number of firsts when it aired on 27 February. Not only was it the first live-to-cinema 4K transmission, it was the first commercial run for the format in which cinema-goers at Chelsea's Curzon paid to see the 180-minute event. It also necessitated the world's first high frame rate 4K. Digital Cinema Package (DCP). National Theatre Live (NT Live) broadcast War Horse from the New London Theatre to over 1000 cinemas worldwide -most of them live but with many also showing delayed 'live' screenings. All but one of those was an HD broadcast, but the significance of the sole 4K TX points the way to the future.
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