Go to this CNet link to read about it - it's been asked here at least 1000 times!!!

http://cnet.com/hdtv-world/

Answer:
To correct a few of the utterly misinformed and misguided answers here:

A typical 37″ plasma will draw around 250 watts.

A typical 37″ LCD will draw around 200 watts.

Hardly a massive difference, is it?

Plasma Televisions do NOT run hot.

They run a lot cooler than the old style CRT (tube) TVs.

Both LCDs and plasma will last for around 60,000 hours of normal viewing.

Plasma and LCD televisions can both be wall mounted.

LCD TVs DO suffer from screen burn - I know, I've seen it.

It just takes longer than a plasma.

LCDs suffer from ghosting and lag far worse than plasmas.

LCD screen are plastic and easily damaged.

Plasma screens are glass and much tougher.

It is only the very latest, most expensive LCDs than can match a plasma for sharpness and clarity

Plasmas have the same connections as LCDs.

If you want to know the truth as to why 63% of the population prefer plasmas, check out the website below.

Answer:
Personally if you have a little extra coin go for the plasma I own 1 25inLCD and 61 LCD and2 50 in plasma and 1 58 plasma and when you get down to it all to get a LCD with the feathers that can make the picture close to what a plasma can get you the cost can be the same.Make sure to get the warranty. you don’t need to keep the box intact throw it away after you take it out of the box. They do run a litter warmer use a tiny more electricity not enough to make that massive of a difference. In my opinion plasma is the way to go. The price just keep falling month to month. There are a lot of specs to go over it would take a week to explain. Just go down to any major retailer or two and beat there brains for knowledge you don't have to purchase. After listing to them find one you’re interested in and research it on the Internet find the lowest price and go back most major retailers will price match. (remember shipping and handling in that price)
Answer:
Really guys, no one knows?

Plasma gives better picture in movies (well only panasonic pioneer and Samsung plasmas) and Television shows.

LCDs give superior picture in daylight. They use less electricity and whatever (and all the unimportant useless things that won't make you feel better when you realize that buying an LCD was a large mistake.)

Anyway LCDs blur with fast motion, they cant show the true color of black, and they’re generally thicker.

Answer:
Plasma technology consists hundreds of thousands of individual pixel cells, which allow electric pulses (stemming from electrodes) to excite rare natural gases-usually xenon and neon-causing them to glow and produce light. This light illuminates the proper balance of red, green, or blue phosphors contained in each cell to display the proper color sequence from the light. Each pixel cell is essentially an individual microscopic florescent light bulb, receiving instruction from software contained on the rear electrostatic silicon board. Look very closely at a plasma Television and you can actually see the individual pixel cell coloration of red, green, and blue bars. You can also see the black ribs which separate each.

Whether spread across a flat-panel screen or put in the heart of a projector, all LCD displays come from the same technological background. A matrix of thin-film transistors (TFTs) supplies voltage to liquid-crystal-filled cells sandwiched between two sheets of glass. When hit with an electrical charge, the crystals untwist to an exact degree to filter white light generated by a lamp behind the screen (for flat-panel TVs) or one projecting through a small LCD chip (for projection TVs). LCD Televisions reproduce colors through a process of subtraction: They block out particular color wavelengths from the spectrum of white light until they're left with just the right color. And, it's the intensity of light permitted to pass through this liquid-crystal matrix that enables LCD TVs to display images chock-full of colors-or gradations of them.

Plasmas produce superior black levels, but LCD's are catching up. Check Sony's XBR series LCD's. LCD's run cooler, plasmas emit a lot of heat. Pioneer Elites Kuro plasma is supposed to have the best black reproductions. Some say the life of Plasmas can't be measured and how to dispose of or repair has been addressed.

Plasmas have a marginally lower retail price than LCDs. LCDs can have a sharper picture while (my opinion) plasmas are clean and clear but softer in display.

Plasmas have a glass screen making reflection of light an issue. LCD's usually have a flat finish making reflections almost non existent.

LCD's are superior for gaming, Plasmas for movies (my opinion). LCD's aren't apt to burn-in like Plasmas used to be. Orbital pixelation for plasmas has helped resolve this problem.

Answer:
ok, my advice to you would be : GO FOR LCD

reasons:

they consume less electricity, so are very economical

last longer than plasma tvs

very light, to move around and to mount it on wall

they don't suffer from burn-in or image ghosting like the plasma

their screens are NON-REFLECTIVE, whcih makes them great for anytime viewing, whether bright light or dark

the images are sharper than plasmas

they are very compatible with computer and other connections

and finally: You can enjoy all your HD viewing and all other great features in one machine called 'LCD TV'

Answer:
Plasma's are much more pricey, and you’ve to keep the box INTACT otherwise the warranty is void. Screen burn is prominent in them, and if you live like 6,000-7,000 feet above sea level it has to work much harder, and it has over-heating issues, buy an LCD.
Answer:
Plasma uses more electricity.

Plasma has wider viewing angle and greater contrast.

Plasma Television gets hot!

Answer:
HowStuffWorks.com will be the best source for that.

But if you dont wanna read, just purchase an LCD.