Both Plasma and LCD technologies attempt to deliver the same (similar, in any case) results; both are used in televisions that are flat and thin. Here you can read side-by-side list of what each has to offer that the other one does not.
Plasma Television Overview
1. Plasma displays are made up of cells that contain glass panels. There’s a narrow gap between the panels that’s filled with neon-xenon gas in plasma form. This gas is charged when the Plasma TV is in used electrically. This charged gas strikes phosphors (red, green and blue) producing a TV image. Each red, green and blue phosphor is a picture element, better known as pixel.