The highest display resolution of the 50PUK6809 is 4K Ultra HD. That's over four times the display resolution of the most frequently found HD type of Full HD. 4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
This TV's display resolution (4K Ultra HD) is in fact the best display resolution across all televisions of a similar type and age to the 50PUK6809.
Across comparable types of TV the worst display resolution is Full HD.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
We think you might also be interested in some of the alternative 4K Ultra HD TVs currently available including because of it's better review score, the LG 55UB820.