I’m also firmly in the LCD camp.
But, I think I recall hearing that plasmas are desirable in low-light applications. Like if you’re gonna put it in a window-less room for a home theater kind of application.
That said, there are LCD televisions on the market now with 10,000-to-1 contrast ratios… and Sharp recently previewed an LCD boasting 1,000,000-to-1 contrast ratio.
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Counterintuitively, LCDs actually burn more power when displaying black.