The highest display resolution of the 55PUS8809 is 4K Ultra HD. That's over four times the display resolution of a Full HD TV, which is the most frequently found display resolution. 4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
A 4K Ultra HD HD type is actually the best display resolution amongst all TVs that are a comparable age to the 55PUS8809.
Amongst similar types of television the worst display resolution is Full HD.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.