That's not quite correct on a couple of points - not ALL types of LCDs rely on polarization (some work via a switchable light-scattering effect, for instance), and the way the standard twisted-nematic (TN) or "supertwist" (STN) types operate isn't quite as described above. But it's certainly close enough with respect to the vast majority of color displays that might be used in this application, with regard to the fact that they DO pretty much all output polarized light. (Using an LCD display with polarized sunglasses can be interesting, to say the least...:-))
Better to go with a plasma panel, if it MUST be a "this flat screen" - or what's wrong with the good ol' color CRT?
Bob M.