As far as the commercial market is concerned 4K and Ultra High Definition (a.k.a Ultra HD or UHD) are two words for the same thing: resolution that will look so real, your jaw will drop. However, in reality these terms allow you to compare display capabilities by pixel resolution.
So, let’s compare 4K vs. normal HDTV.
You’ll mainly hear 4K and UHD in reference to TVs. What is 4K TV? It’s is a professional digital cinema standard, which refers to 4096 x 2160 pixel resolution. To get the best 4K experience your TV should have 3840 x 2160 or 4096 x 2160 pixel resolution.
How much better is 4K compared to normal high definition (HD) TV? An average HD TV has a resolution of 2.07 megapixels whereas 4K TV has a resolution of 8.29 megapixels–meaning it has quadruple the number of pixels (8,294,400 to be exact) and over 23 times the resolution of an average HD TV. This means that the picture is much sharper with more clarity, depth, and detail.
When streaming TV and movies in 4K, you’ll need to make sure that you have a fast internet connection because the high resolution requires a lot more bandwidth than streaming Netflix on your iPad, for example. You will also need to make sure you have a TV capable of 4K definition.