If I could darken my entire living room, there's nothing that would keep me from a plasma. I purchased a 50" plasma a few years back for a few hundred dollars. The picture was astonishingly amazing, and the ratings for the tv seemed to state it was far from the best example of plasma TVs as a whole.
I did have burn in issues, running my ps3 for a short time left some significant temporary burn in that lasted the better part of a day. As I have kids, and I tend to be forgetful, I knew either due to me or my kids, something would happen and I'd be stuck with some terrible, permanent burn in.
But even removing those issues, the comments about the screen being a mirror are so incredibly true. I am home primarily during the day, and it was impossible to watch anything at all. I never realized just how bright my rooms actually was, and I was surprised as this wasn't an issue with my tube tv.
So back it went and I got a 3D LED/LCD TV for the family. It was passive, so no expensive glasses that can break. It was 5" longer and came with a free 3d player, and while I paid about twice the price, I did get more from a quantity standpoint.
Motion, however, is absolutely terrible on this set, and if I had the money I'd change to something else. At the time, I couldn't have picked a plasma and the higher refresh rate TVs were way out of my price range.
Really, though, so much of this is a moot point. The next upgrade for me will likely be whatever comes after 4, possible even after 8. I sit about 10+ feet from the TV, so unless I bought an 80+" TV (which would work thanks to the design of the house, it's about the only thing they did right) an upgrade wouldn't mean much.
And, beyond that, my main movie collection is criterion films and classics. How much better will 12 Angry Men, Yojimbo, Seven Samurai and The Seventh Seal REALLY look?
I understand films like Gravity, Avengers and such are made with ultra high resolutions in mind, and I'll be sad that I won't be able to experiencing them with the current tech, but those films make up so little of my movie watching, which does make me an anomaly, I'm sure.