The Samsung UE48JS9000 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 common display resolution. 4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
This television's display resolution (4K Ultra HD) is actually the best display resolution amongst all similar spec TVs that were launched around the same time as the UE48JS9000.
The worst display resolution across similar types of television is HD Ready.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
There are a number of alternative 4K Ultra HD TVs currently available that you might want to consider including cheaper TVs such as the UE48JS8500, the UE48JU7500, or the UE48JU7000 all from Samsung.