The highest display resolution of the UE40JU6465 is 4K Ultra HD. That's over four times the display resolution of a Full HD TV, which is the most common 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 across all comparable spec televisions that were released more than a year ago.
An HD Ready HD type is the worst display resolution across comparable types of TV.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
It may also be worth also looking at one of the alternative 4K Ultra HD TVs currently available including cheaper TVs such as the Samsung UE40JU6410 (£449.00), or the LG 49UF7767 (£1,059.77).