A 4K television has four times the number of pixels as Full HD and is the only way to truly experience films the way their makers designed them to be seen, reproducing all the subtle detail and texture of the original image with an intense depth that draws you into the picture.
The term '4K' refers to a TV or monitor that has a horizontal resolution of approximately 4,000 pixels.
This is also commonly referred to as 'Ultra High Definition' (UHD), which is used for displays of at least 3840px x 2160px.
A comparison of different display resolutions is below:
Please note that a 4K unit is best experienced when displaying the highest quality content possible.
It may not drastically improve the quality of DVDs or Standard Definition TV as compared to viewing them on a lower-resolution display.