The 48UHL9102 has a maximum display resolution of 4K Ultra HD. That's over four times the display resolution of the most common 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 actually the best display resolution amongst all latest mid-size TVs.
An HD Ready HD type is the worst display resolution across comparable types of TV.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
Alternative 4K Ultra HD TVs currently available which you might want to look at include the LG 49UH610 (£499.00) which has a better Rating; or the Samsung UE43KU6000 (£449.99) which is cheaper.