The Maths: It’s called Ultra High Definition or UHD, 4K is horizontal pixels on a rectangular frame. So multiply vertical 2K pixels and total = approx. 8 million or 8 megapixels (8MP). Actual native Ultra HD resolution = 3840 x 2160 = 8,294,400 pixels. So, slightly less than 4K top and slightly more than 2K side = a bit over 8MP total. Close enough for horseshoes, rock and roll, and marketing.
Infrastructure? Mobile devices using Qualcomm QCOM +1.11%’s Snapdragon 805, will have 4K cams, data pathways, processing, memory, and display. So, a device can capture 4K, compress it, move it around, process it, and put it on a screen to view on YouTube or Hulu.
End to end 4K is already showing up in movie theaters and video gaming.
4K flat panels are slowly becoming the standard.
Sooner than later, 4K will become the display standard worldwide.