First off, agree with Mister Matt...Jane Eyre's were beautiful, especially when they were "outside." But I always felt that those were part of the scenery, not the actualy scenic design (boy from what I can recall about "In the Light of the Virgin Morning" -- BEAUTIFUL scene (& song)...except the random plants/trees that swung in front of/around the actresses..!)
"on the other hand, when it's done poorly, it can make a mediocre show seem even worse ... like it did in Woman in White. the book and score were not great"
I really enjoyed Woman in White's & their projections; agreed with someone else that while they were a little too over the top, the whole image they were trying to do (& set up from the absolute beginning of the outer walls before the show started) was the whole moving image thing. While it was extremely complicated, it's still one of my favourite sets ever. And for the recording, I would not consider the score of Woman in White weak, ... it was Tony-Nominated

!
"I get that it's high-tech and I'm imagining it's cheap as hell--no labor costs, no materials"
Sonia Friedman, the main-producer of Woman in White (& yes, Maria's sister), has been on record to say that the projection design for WiW was cheaper than doing the full-out sets. For those who did actually see it/remember the story line, it took us everywhere from a railroad cut-away (which was my favourite at the end!!!!!) to two seperate mansions to the streets of London and more; totally scattered over England so something was necessary. Apparently, if more (regional) theatres were more equiped with the technology for these projections, it would be extremely low cost to run a tour of the show, considering all of the budget would be considered on the London/Broadway budgets, with minor tweakings obviously. However, the initial funds were slightly costly, as there were several artists who made the images, several who put them on the projections-to-be-shot, projection/projector specialists were brought in...!