I have a Sony Bravia XBR series TV, and the backlighting is decent. I think the newer generation of OLED screens might have solved it, though. At least, whenever I walk by the TV aisle at Costco, I am really impressed with how their demo videos appear 
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I am also tempted by these short throw projectors that sacrifice image quality (slightly) for a much larger viewing area!
I talked to one of my friends who owns a Audio/Video shop, and he claims that they do an excellent job at reproducing colors with minimal input lag [probably won’t work well for a FPS]. They work well even with a medium amount of lighting provided they are paired with a really good screen.
I am hoping to see one live in a few weeks once it has been installed at his store, so I will have a better answer then. I am still skeptical that they will match the darkest and lightest color extremes of a high quality OLED or QLED screen.