I can see why mfrs. are abandoning plasma. Plasma is the Ferrari or Lamborghini of TV displays. They require more than the usual care in driving (simply turning on and watching) as witnessed by the 300+ pages posted here of problems and specialized settings that aren't necessary on "regular" TV panels.
I'd agree with your statement. Plus higher manufacturing costs. Plasmas do need more care . I would never recommend a plasma for a tv mainly used by kids for example. For your average Joe Blo who has kids who plays video games for example, i could imagine Panasonic going nuts with all of the calls about IR.
99 percent of TV users do not worry about settings, they just watch out of the box and they don't worry about breaking in their tv or avoiding for example watching sport all day.
It just happens that a plasma has always been perfect for me because i have quite a short attention span so never watch or do anything for that long before switching to something else.
There will definitely be future tech with better than plasma quality picture but more robust, whether that's OLED, who knows