When the Kuro Elite measures pitch black or so close that a meter has a hard time measuring, not sure how you could have expectations that exceed that?
Brighter is important if you are viewing it a lit room, so no matter how great the plasma looked, and the blacks were, if you can't see the picture, it doesn't do much good, so brighter does have it's advantages in certain situations.
I agree with you that 99% of TVs you see in stores have that bloated color pop, some even have settings for store display mode, but color accuracy can not be denied, and also taking into consideration everyone might have a different preference in color presentation.
I think the biggest advantage is HDR, specifically on 10 bit panels, if you have played a video game or watched a movie that is HDR, the impact is quite impressive.