While many people state that burn-in/uneven phosphor wear is not a problem on modern plasma sets, that seems to be far from a consensus. I spent a great deal of time researching flat screen TVs last year. As a movie lover, the more natural colors, deeper blacks and better motion handling of plasma really appealed to me. However, as I did my research, it became clear that burn-in is still a huge topic of conversation in the plasma community and there are quite a few people who maintain that burn-in/uneven phosphor wear is still a problem.
Part of me really wanted to buy a plasma, but I watch a lot of 4:3 material and did not want to worry about uneven phosphor wear from the side bars (my CRT-based RPTV had this problem and I didn’t want to run into it again). After doing a ton of research, I finally posted in the Master Burn-in thread in the plasma forum at AVS. I asked if I needed to worry about burn-in if 30% of the material I watched was 4:3. I got many responses, most suggesting that I stretch 4:3 material (no, I won’t do that). Not a single person there suggested it would be okay to watch 4:3 material 30% of the time. The consensus seemed to be that plasma was not for me.
I’m not saying that burn-in is still an issue with plasma TVs, just that there is no general consensus that it’s not. Before someone buys a plasma set, they should do plenty of research and decide for themselves. Burn-in may or may not be an issue with plasma TVs any more, but there seems to be no consensus among plasma owners either way
In my case, it turns out that the new house we bought didn’t have a good place for a hang-on-the-wall TV (the reason I was researching flat screen models) and I ended up buying a DLP RPTV. Amazing picture, no burn-in worries, great motion handling, low price. If you don’t need a really thin TV, you should at least consider a DLP set. It is, no doubt, a dying technology (mush more so than plasma), but there are still great sets out there for really low (comparatively speaking) prices.
By the way, in my opinion, plasma is far from dead. Panasonic makes some really good plasma sets and Samsung has made big advances in recent years. There are many people who thinks Samsung’s plasma sets are as good as, or better than, Panasonic's. If you decide that a plasma set is the best choice for you, I wouldn’t worry that the technology might be dying (which I’m not convinced it is). I’d say get yourself a Panny or Sammy and be happy.