No, it hasn't gone away, that's why I said, "and it's not faded much, if at all". There's no silver bullet to remove it if it's serious IR or burnt in. It's going to just take a long time of viewing regular content to try and get it to go away. You might be able to reduce it enough so that's it's more tolerable at least. I've resolved to just live with it because there's not much else I can do, so why worry anymore.
What irritates me the most though, is that each time after gaming sessions, If I wasn't watching shows or a movie, I had let the TV run for 3 hours on full screen cable HD content until it auto shut off. I thought I was doing the right thing to mitigate any possible IR, but alas it didn't help much.
I still game on mine. It's only Halo 4 that had issues for me, because that shield bar is a death mark for a plasma, well, at least the ST50 I have anyway. None of the other HUD elements of that game cause issues because they're more transparent. If you read the IR thread, you'll get a feel for what types of games have a HUD that will cause IR issues.
All other games I've played don't have as bad of a static HUD, because most have a either more transparent HUDs, or the HUD fades off and on, a feature that would be really nice if developers offered as an in-game option.
Don't worry about the black bars on movies. I watch movies like that alot and it's not caused any IR problems with mine. But obviousy, if that's all you watch, there will eventually be uneven aging.