Came across the below article regarding the Panasonic plasma black level.
Panasonic: Plasma black levels no longer worsen | Crave - CNET
Panasonic: Plasma black levels no longer worsen | Crave - CNET
This hype of "worsening black levels" was a ghost created by the impotent competition to Panasonic.
The "worsening black levels" meant that - in about three years time, the set will move from 0.007 to 0.012 maximum.
Hyped? may be, but the issue most certainly is there. Panasonic's selling point is their black level and they wanted to do catch up with kuro so they just released their PDP's with lowered black levels and let it raise eventually. This issue does not happen with other manufacturers. Also the raised black levels compromises in picture details ( compare a top end Panasonic plasma with a top end plasma from another manufacturer and you will know)
Also this hype is two ways , one way is people hyping the black level raise and the other is Panasonic reps in many forums writing godly things about Panasonic plasma.
http://www.avsforum.com/avs-vb/showthread.php?t=1167339
The overall brightness of the plasma starts to degrade after few years and this is applicable to all plasma brands.
[fL] or [cd/m2] ?
Having said all i must admit Panasonic plasma is one of the best Flat Panel television available in the market today which offers amazing picture quality in spite of any issue it might have.
But Panasonic is not the best in class in terms of picture quality since kuro holds that rank ,people never found any serious faults with kuro.
Hence, Let us all be fair to Panny and don't "blacken" their record....
I still love Panasonic plasma and that why i bought one but i also bought a Samsung plasma later and i liked its picture processing little better.
BTW pro Panasonic plasma like you said is excellent but very expensive and i don't know why they aren't brining that technology into consumer tv's. I don't mind paying extra if i get 9G kuro stable blacks with pic processing like Samsung combined in one plasma.
Which Panasonic Plasma you have BTW?