That's interesting. The dangers of long gaming sessions.
There is some kind of 'pixel shift' thing on Samsung's new plasmas which periodically nudges everything over by one pixel and then back very rapidly which should (in theory) prevent that kind of thing happening. I would think the Pansonic plasmas also have such a feature? But that's a good point lots of games will have some static elements like that.
Plasma = very low input lag, risk of image retention, PQ can look washed out in bright daylight environment, black level deteriorates over time (Panasonic 2010 and 2011 models there is a step change quite early on to protect life of panel), possibility of panel electronics buzz noticeable close up.
LCD/LED = high input lag, PQ can look washed out off axis, black level can look grey in low light environment, uneven backlight (especially edge lit LED), poor sound on very thin models.
Not all LEDs have high input lag.
The Panasonics have a pixel orbiter which does exactly as you say. Doesn't really help with a solid, static image displayed for a considerable period of time though. Or at least it doesn't seem to. I wish there was an option in some games to control the static images that are displayed, or at the very least make them less solid.
I will be using the tv for PC gaming, i currently have a 24" 60hz sammy looking rather beautiful on my desk but its just too small iv heard alot about lag from LED's so will be looking at a model that has 100hz refresh rate. Plasma's appeal because of there awesome benifits, but i didnt think IR was much of a problem anymore?
100Hz is not going to stop input lag. I am not even sure that TV's that say 100Hz are actually receiving an input of a 100Hz they just use software to kind of put an extra frame inbetween the normal frames of a 50Hz input. Monitors all the way for PC gaming (maybe not so important if you are not playing first person shooters I suppose)