I realize that the "burn in" problem would make a plasma monitor problematic for computer users, but a hardware screensaver could remedy the situation. What are the other reasons for a lack of plasma ...

Holy moly! Last time I checked it was 52" as teh biggest. Viewsonic makes it and it only costs $20000, so buy two. This is good news for the smaller 42" Plasma, which has dropped to $5000. Last year ...