I think we need religious displays like the advertisements in the movie Minority Report. In the movie advertisements were keyed to the person waling past them. With the recent debacle of the Christmas trees at the Seattle airport that were first removed because of a complaint and then subsequently returned after even more of an outcry – this technology is needed.
Though I have heard that they were working on this type of display but came up with big time problems. It works part of the time. When a Christian passes it shows a holographic Christmas tree or a Nativity. Religious Jews get a menorah. Atheists some nice primordial ooze with a clock representing billions and billions of years. The problem came to tests with agnostics. The displays kept burning up. They would switch rapidly between trying to show something possibly religious then back to nothing and back and forth in rapid succession since the displays were unable to sync to the muddle of agnosticism.