The UE50J5100 has a maximum display resolution of Full HD. That's 75% less display resolution than a 4K Ultra HD TV, which is the most frequently found display resolution. Full HD TVs have a resolution of 1920 x 1080 pixels.
Full HD TVs have a resolution of 1920 x 1080 pixels.
If you would prefer a TV with a higher display resolution then you might also want to look at the Hisense H50M3300 (4K Ultra HD).