Not a good idea to run it on a plasma screen. It only takes a relatively short time to burn an image into a plasma display. I have heard from friends first hand, that ruined their brand new plasma TV by playing PS games on it. Burn in took less than an hour, and was permanent. I think it was GTA3, and the little health and weapom icons could still be seen.
Better not watch any 24 hours cable news channels then. Or any cable channel with a logo in the bottom right.