There are a couple of other things to be aware of. What is 4K, Ultra HD and UHD? Firstly, not all Sky systems support 4K – you'll need Sky Q, Sky Glass, or Sky Stream. Secondly, even if your Sky ...

there's a definite wow factor about the very best quality camera work on Sky Sports HD1 or HD2 channels. And BBC HD can be relied on to repeat its spectacular Planet Earth series. Pictures with ...