The 49PFL7900 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.
A 4K Ultra HD HD type is actually the best display resolution amongst all mid-size TVs that are a similar age to the 49PFL7900.
An HD Ready HD type is the worst display resolution amongst similar types of television.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.