4K and Ultra HD: Everything you need to know about the hot new resolution
http://www.techradar.com/news/television/ultra-hd-everything-you-need-to-know-about-4k-tv-1258884
Update: With the Apple TV 4K arriving soon, we've given our Ultra HD explainer an overhaul to fill you in on everything you need to know about the new resolution.
Original article continues below...