Over the last year, the terms UHD and 4K have become so conflated that TV makers, broadcasters, and tech blogs are now using them interchangeably. Let me just say this now: 4K and UHD (Ultra HD) are not the same thing. Yes, as far as the consumer is concerned, there isn't much of a practical difference -- but, in much the same way that consumers got screwed over by "HD Ready" displays, it's a good idea to clarify the difference between 4K and UHD before things get out of hand.