In Depth: 4K, HDR, Dolby Atmos, Hi-Res Audio - which do you really need?

4K,HDR,DolbyAtmos,Hi-ResAudioThe world of AV has had a serious upgrade over the past eighteen months, but just how big an impact will it have on your home entertainment habits? Is the time finally right to upgrade to Ultra HD? Is 3D audio the next big thing in your home cinema? Or should you save your cash for beer and skittles?Time to weigh up the promise and potential of the latest home entertainment advances…4K Ultra HDYou know the drill: 4K TV screens offer four times the pixel densit