The Samsung UE55J6270 has a maximum display resolution of Full HD. That's 75% less display resolution than the most frequently found HD type of 4K Ultra HD. Full HD TVs have a resolution of 1920 x 1080 pixels.
Full HD TVs have a resolution of 1920 x 1080 pixels.
If the display resolution of this large TV is too low for you then you might want to consider the UE60JU6400 (£1,120.00) (4K Ultra HD), or the UE55JU6465 (4K Ultra HD) both from Samsung or the LG 60UF671 (£878.89) (4K Ultra HD).