How about the various pros and cons of each display:
LCD:
No screen burn, no cooling fans required. However, yields of panels are worse at plasma panel sizes, and the response time of an LCD pixel is poor compared to a Plasma pixel. Also they need to have the backlight replaced after 10,000 hours or so I'm told, and since LCD is effectively a filter, they are not as efficient at producing the required brightness level.
Plasma:
Large panels have decent yields, fast refresh rates, excellent brightness and the panel supposedly will last about the same as the backlight in an LCD display. However they are hot, noisy (when fans are running) and quite fragile things, which suffer from screen burn and phosphor wear.
Not so simple is it. From a purely technical point of view, they're about equal. From a manufacturing perspective, Plasma is way ahead.