bigboss:It really boils down to what your preferences & priorities are. Yes, they're not cheap, but certainly smarter looking than blinds & curtains all over (which may not be universally practical) & viewing in a dark room all the time.
i'd have blinds and curtains anyway as have them on every window for privacy, lock drafts and heat retention ect - they just work as an added bonus of reducing the light in to the room - projectors are a lot brighter these days than they used to be and images even with some ambient light or at least in my setup don't offend me to much