Plasma
Plasma displays function differently than any other TV technology in that they actually produce light independently at each pixel on the screen, as opposed to projecting a separate light source through or off of other elements to conjure a picture. A plasma "screen" is actually a dense network of individual cells, three for each pixel of the display (coated with red, green and blue phosphors, respectively). Each cell is impregnated with a rare-gas mixture and connected to an individual electrode. When the electrode for a given cell is charged with an electrical voltage, the gas is converted to a plasma state and emits a burst of ultraviolet light; this in turn causes the phosphors to react and produce bright visible light at the pixel level. By varying the voltage and intensity of the electrical charge, the proper combination of red, green and blue light is produced in each pixel to combine into a bright, colorful composite image. Plasma TVs are available in sizes from about 40" up to 70"+, but be prepared for sticker shock as your size desires increase.

Strengths
Obviously, plasma TVs are desirable for their sleek form factor ” about 4" deep and wall-mountable, they're undeniably sexy. Furthermore, plasma produces a very bright image that can be viewed in a well-lit room, with superb color accuracy and saturation. It's a matter of opinion, but many videophiles regard plasma's color vibrancy as beyond compare among current technologies. Because the light is produced at the screen rather than projected onto it, focus is consistent and reliable across the entire screen surface, and plasma screens can be viewed from angles as severe as 160 degrees off-axis without detrimental effect. And plasma's accurate pixel structure produces a picture that is geometrically perfect from edge to edge and corner to corner, with uniform light output and a crisp, lifelike image.

Considerations
Early plasma TVs got a bad rap for their susceptibility to "burn-in" from static pics-4080 such as stock-tickers and video-game gauges. Recent designs have largely eliminated this problem, incorporating (among other approaches) "pixel-orbiting" technologies that shift images, almost imperceptibly, over time to limit the occurrence of burn-in. However, if you are an avid gamer, you may wish to consider an alternative technology like flat-panel LCD, which is immune to burn-in.

Additionally, although known for their high contrast (relative to LCD) and spectacular color saturation, plasma displays have historically had difficulty reproducing pure blacks. Recent enhancements have significantly mitigated this problem, but sometimes at the expense of fine detail in dimly-lit areas of the picture.

The bottom line
Overall, plasma has maintained a reputation as the no-compromise high-tech HDTV display technology. While that's not entirely accurate, there's no question that a plasma TV on your living room wall will deliver amazing video performance and, quite likely, a parade of drooling friends through your door as well.