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Good article, Evan. Seems to me a straightforward approach is simply to match screen aspect ration to the native resolution of the projector. That way, you'll be seeing the best the projector can do with any given content. An HD projector will fully fill a 16:9 (1.78:1) HD screen with HD content (sat or cable HDTV, Bluray). Sure, standard-def (DVD) content will display in a more narrow image, with black pillars on the sides. But that's to be expected, as are the minor top and bottom bars that result from showing ultra-wide-screen movie content with an HD projector. As you point out, trying to make black bars go away forever involves either significant picture compromises, or expensive projector lenses/automation. Or post-display tweaking (e.g. screens with variable masking).