Burn in on a plasma is possible, but not likely on the new models. My brother is a service tech and does repair on many electronic items, mostly TV's though. He recently went to a service call to a person that did have a new plasma with a bad burn in problem. But this case was really unique. The owner worked at home on their computer and they had their plasma TV on CNN all day long as they worked, I guess just for back ground noise. After six weeks of this, he finally decided to change the channel. CNN was burned in on the screen. The new plasma's do have a feature that lets you wash out some of the burn ins out. Anyway my brother showed them how to do it, and it helped, but was now able to take it all out. I know this surely is not likely to happen to most people, but burn in is possible.
I personally have a new 47" LCD LG 120HZ 1080p and a new 50" plasma LG 240HZ 1080p, and both are great. Both have there advantages. The plasma does have a blacker black, but it does put off more heat. The LCD that LG has more of a matte finish and no reflection on the screen at all (better than any other LCD made by other brands that I looked at) unless the screen is on a black picture, which it is then barely noticeable. Personally, the blacker black is not by that much and not that big of a deal to me. If you are going to be watching your TV in a room were windows are going to cause a reflection on it or bright lighting on it at any time you watch it, I would go with the LCD for sure. Unless of course you have the money to spend on a LED. Needless to say I just also bought a new 32"LG 120HZ 1080p for my bedroom and I went with a LCD. Which is what I would recommend to buy unless the room has no bright lighting whatsoever.
I personally have a new 47" LCD LG 120HZ 1080p and a new 50" plasma LG 240HZ 1080p, and both are great. Both have there advantages. The plasma does have a blacker black, but it does put off more heat. The LCD that LG has more of a matte finish and no reflection on the screen at all (better than any other LCD made by other brands that I looked at) unless the screen is on a black picture, which it is then barely noticeable. Personally, the blacker black is not by that much and not that big of a deal to me. If you are going to be watching your TV in a room were windows are going to cause a reflection on it or bright lighting on it at any time you watch it, I would go with the LCD for sure. Unless of course you have the money to spend on a LED. Needless to say I just also bought a new 32"LG 120HZ 1080p for my bedroom and I went with a LCD. Which is what I would recommend to buy unless the room has no bright lighting whatsoever.