A church can have beauty but also have a projector with the words to the creed or the lyrics of the hymns on it. The parish I attend is gorgeous…truly awe inspiring. And they do use a projector, for I believe a few reasons. 1. it is almost always standing room only and those standing don’t have a missal in front of them like the people in the pews. 2. visitors (and we have a lot of people in mixed marriages, like me) don’t have the responses or creed memorized and having them up on the wall helps them participate and feel like they aren’t standing out as they try to flip through a missal to figure things out. My own husband greatly appreciates the projector when he sometimes attends mass with me.
That said, there are no slide shows or anything flashy. And the projected image is not over the altar, but off to the side. There are actually two, one on each side. It’s a fairly large church. And they are turned off when not actively being used, so not a distraction during the consecration and such.