Plasma technology is on the way out and will be fullt replaced by LCD within the next two to three years - certainly in Europe where we are now about to go through the High Definition revolution over the next couple of years. In the UK we go from 578 lines (PAL625) up to the new 720p and 1080i standards used elsewhere in the world (about time too!!)
LCD will in turn be replaced by a new technology coming along called SED which promises even higher resolution and longer life. LCD's have approx twice the life of an equivalent plasma and cost less to run.
See here for what SED's are:
http://en.wikipedia.org/wiki/Surface...itter_Displays