I live in Tokyo, the land of doodadegadgetry, and have recently undertaken The Quest For The Appropriate Large Flat Panel Display. I chose a 50" plasma (Pioneer 535) because while the HDTV picture on the Sharp 45" LCD is good for high-definition video of snails crawling up a leaf, for sports events it does not cut it. For those who want a 50" screen and can afford to wait another several months AND afford to get products when they come out, I would wait for the Pioneer and Panasonic full-HDTV-capable 50" and 50+" plasmas coming out at or near year-end.
My personal decision was based on the expectation that at some point a few years from now, I would probably need a second one so would go for LCD then when they get the latency issues sorted out.
I did not even consider DLP because the picture always seemed a bit bland to me.