4K ultra HD TV is the latest TV technology which gives is four times the detail of full HD.
At 3820 by 2160 pixels it is more than 8 million pixels as compared with full HD which is 1920 x 1080. Most TV brands have launched their 4K TV’s which can set you back thousands of pounds, however the entry level models can now be bought for less than £500. (at the time of writing – May 2015).
To enjoy the enhanced quality, viewing is recommended on a 40″ screen or above.
Before you rush out and buy a new 4K large screen TV you may want to read the cnet.com article about why 4k TV is stupid.