Pioneer dropping out was due to a huge failure to drive sales volume, they cut and run before they completely sunk into the abyss.
Panasonic shows no signs of stopping the drive for plasma televisions. New efficiency designs, extended panel life, and the advantages in PQ keep the market flowing strong for Panasonic.
It's likely that the OP's friend/co-worker, heard about the LED backlight LCDs and concluded that they would be the death of plasma, which is completely false. The slim LED side lit panels have everyone excited about nothing, which is funny because you can get vastly superior PQ from a plasma of comparable and lower prices. Some of the higher end Panasonic and Samsung plasma sets are every bit as thin as these LED side lit panels, cheaper per inch of screen, and offer better picture quality.