The highest display resolution of the Samsung UE48JU6075 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 of this spec and age.
The worst display resolution amongst comparable types of television is HD Ready.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
It may also be worth also looking at one of the other 4K Ultra HD TVs currently available including the UE40JU6075, or the UN48JS8500 both from Samsung or the Panasonic TX-48CXW404 which is cheaper.