The highest display resolution of the Sony FWD-84X9005 is 4K Ultra HD. That's over four times the display resolution of a Full HD TV, which is the most frequently found display resolution. 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 TVs of a comparable age and type to the FWD-84X9005.
Amongst similar types of television the worst display resolution is Full HD.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
Other 4K Ultra HD TVs currently available that you might want to look at include the Sony KD-85X9505 (£19,999.00) which has a better Rating.