The highest display resolution of the UE48JU7500 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 in fact the best display resolution across all comparable spec TVs that have been available for around the same time as the UE48JU7500.
An HD Ready HD type is the worst display resolution amongst comparable types of television.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
There are a number of other 4K Ultra HD televisions currently available that you might want to look at including the Samsung UE48JU7000[plb_2823161_price] which is cheaper.