The Philips 40PUK6809 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 television's display resolution (4K Ultra HD) is actually the best display resolution amongst all comparable spec TVs that have been available for more than two years.
Amongst similar types of television the worst display resolution is Not supported.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
Other 4K Ultra HD TVs currently available which you might want to look at include the 49UB820, or the 42UB820 (£399.00) both from LG or the Sony KD-49X8505 (£599.00) which has a better Rating.