The highest display resolution of the UE50H6400 is 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 are looking for a television with a higher display resolution then you might want to look at the Samsung UE50KU6000 (£489.00) (4K Ultra HD and higher rated) or the Hisense H50M3300 (£429.00) (4K Ultra HD and cheaper).