I have a plasma TV that I use for gaming (Panasonic Viera). It's a great display with none of the contrast or ghosting disadvantages of an LCD, but it's heavy, delicate, and most importantly, it puts out a ton of heat. A plasma TV is basically a grid of tiny neon lights.
Like any active display (CRT, plasma, or OLED) it can suffer from burn-in, but I haven't found that to be a problem for my usage.