Big D, this discussion of "burn out" of plasmas has come up here before. Many advocates say it's bunk or over-hyped as an issue. Still, 10,000, even if accurate is a lot. It's like 5 hours a day, each day of the year, for 5.5 years.
I think of it this way, if the phospors (or whatever) get totally wacked at 10,000 hours (or whatever it is) then do they get slightly wacked (fuzzier?) at, oh, say 2000 hours, 5000?
My 55" Mitsu rear-proj HD tv still looks good to me!
I won't replace it until I have to, or until I can replace it for same size for UNDER $1K *and* get a MUCH better picture.
TJR