The Panasonic TX-49CXX759 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.
This TV's display resolution (4K Ultra HD) is in fact the best display resolution amongst all comparable spec televisions that have been on the market for a similar time to the TX-49CXX759.
Amongst similar types of TV the worst display resolution is HD Ready.
4K Ultra HD TVs have a resolution of 3840 x 2160 pixels.
It may also be worth also looking at one of the other 4K Ultra HD TVs currently available including the Samsung UE48JU6445, or the LG 40UF671 which is cheaper.