How about the sticky right above your thread???
Plasma is only getting phased out from manufacturers who can't compete in the category (which there are really only three who compete). Pioneer, Panasonic & Samsung (rated in quality in that order).
The profit margin on LCD's tends to be higher though the cost to manufacture is still higher at this point. That is another reason that many manufacturers have migrated that direction. This will probably change as things move forward though.
In any case, it shows where the true tendancies lie with a company. Performance vs. profit or a good mix of both? The companies doing well with plasma have proven the latter (mix). Many lcd makers went the profit route though they know plasma offers superior results.