The highest display resolution of the LG 65UB9200 is 4K Ultra HD. That's over four times the display resolution of a Full HD television, which is the most common display resolution. 4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
A 4K Ultra HD HD type is in fact the best display resolution across all TVs that have been around for a comparable time to the 65UB9200.
The worst display resolution amongst similar types of TV is Full HD.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.