The only real advantage LCD has over plasma is the burn in problem and it is not as much an issue as it once was. Modern plasmas are about as susceptible to burn in as CRTs. Most people don't realize that an LCD screen can suffer from burn in also. Most newer plasma screens refresh themselves to get rid of burn in and the new Panasonic pro monitors will have non glare screens. I have both plasma and LCD monitors and the Panasonic pro plasma looks much better than any LCD I have seen.
Why are LCDs more popular than plasma?
I have a rough time seeing differences in picture quality between brands and models, but the difference between plasma and LCD are overt even to me. When I go to bestbuy, fry's, etc. and gaze at their displays of flatpannels, plasma televisions just look beautiful, despite the reflections, while LCDs just remind me of working on my laptop. Is there more merit to the quality of LCD than I observe or is there some other reason LCDs outnumber plasmas?