Plasma or LCD.
There is enough information out on the web about how both these technologies work. Personally I feel as a consumer it is important to understand the technology difference to a certain level, but more importantly a consumer needs to understand its advantages, disadvantages, and usages.
In my opinion, the differences between plasma and LCD are miniscule. But if you want to get technical then continue reading...
For your video enthusiast who is deeply concerned about pure blacks and whites, plasma might be the way to go. Technically plasmas do provide better blacks, which in turn gives you better range of colors. The disadvantage being burn-ins. But this is a thing of the past. Almost every manufacturer offers some kind of protection against burn-ins. Image shifting, orbiting, negative imaging and white wash to name a few.
For those of you wondering what burn-ins are; remember your old computer monitor and how the image of your ‘my computer’ logo is always on the screen? If you leave the same image on the screen for extended periods of time, it will eventually burn into the screen.
Now, LCDs. LCDs do not have an issue with image burn ins. This means LCDs are great for computer usage, gaming, commercial use, etc. The disadvantage of course is the claim that LCDs cannot produce the same range of colors. But in my opinion, there is barely a difference. Because LCDs work off a backlight, they are unable to produce a true black. To fight this manufactures now started to control the backlight to bring down the power to increase the quality of blacks.
Solutions. Every manufacturer as a default cranks up the contrast ratio and the brightness. They do this to attract your eye as you walk onto the sales floor. Provided you tune this down to appropriate levels, blacks and whites will improve drastically.
I personally would suggest looking into other features that a TV could offer, such as built in PVR capability or a USB connection to show off your vacation pictures or the number of inputs that are available so you could connect anything and everything.
So again in my opinion, it does not matter too much which you decide to go with, the one recommendation I have: If you are going commercial, advertising or anything where there will be a fixed image for long periods, LCDs would be a worry free solution.