Some films have been labelled as UHD on the V6 and 4K on the 360 - but they are currently streaming at HD and are upscaled by the box.
One of the forums mods implied that they will be true UHD soon.
@Anonymous wrote:
Certain movies on Sky Cinema are now in 4K on Virgin. Twist, Bloodshot... to name a couple!
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VIVID 600 (690/44mb) in Area 31