The UE40JU6410 has a maximum display resolution of 4K Ultra HD. That's over four times the display resolution of the most frequently found HD type of Full HD. 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 across all televisions that have been on the market for a similar time to the UE40JU6410.
The worst display resolution amongst similar types of TV is HD Ready.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
There are a number of other 4K Ultra HD TVs currently available which you might want to consider including cheaper televisions such as the LG 40UF7707[plb_2940851_price], or the Samsung UE40S9[plb_2983972_price].