The Samsung UN50KU6300 has a maximum display resolution of 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.
This TV's display resolution (4K Ultra HD) is in fact the best display resolution amongst all televisions that have been around for a comparable time to the UN50KU6300.
The worst display resolution across similar types of TV is HD Ready.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.