1- Life span, the number of viewing hours a monitor provides before dimming to half brightness, is one of the biggest advantages LCD has over plasma. Though the numbers vary among the different brands, plasma displays generally offer around 20,000 hours, while LCD sets last for up to 50,000 hours.

2- One of plasma technology's known issues is something called burn-in. It happens when your television shows a still image or an icon for so long that its "ghost" remains on the screen. For example, if a stock ticker or a news crawl continuously runs along the bottom of your display, that strip may be burned into your set.
To their credit, LCDs don't suffer from burn-in, nor do they have troubles at high altitudes, where the air-pressure differential causes plasmas to emit an irritating buzzing sound. So, if you live at the top of a mountain, we don't recommend that you get a plasma, though some manufacturers are selling special sets that they claim are immune to the problem.

3- A general rule of thumb is that plasmas deliver better home-theater performance than LCDs. The difference is due mostly to the fact that LCD monitors typically can't display black as well as plasmas; it ends up closer to dark gray. That shortcoming decreases the amount of detail you can see in the shadows and ultimately leaves the picture looking less three-dimensional.

Price-to-size ratio
While neither LCD nor plasma monitors are a bargain, on a price-per-square-inch basis, plasmas currently have the edge. Look at it this way: technically, a 42-inch plasma gives you almost twice as much screen real estate as a 30-inch LCD panel, but they both go for about US$3,000. By 2005, you may see 37-inch LCDs hitting that price, but larger versions (50 inches or more) won't cost the same as their plasma equivalents for a while.