Except for the fact that outdated plasma 1080p still tend to have superior picture quality....... Picture quality over resolution any day.
This is the thing....
I have a 50" 4K LED Panasonic and still have an 'old' 60" Pioneer KRP-600A Plasma in another room and at times I come to the same conclusion.
Does not matter how many pixels they tell you something has, it is the quality of that resolution that can be appreciated is what really matters.