I don't know, I'm not particularly young myself (or very technologically advanced, either), and I do find a lot of the computerized stuff at the new Gettysburg VC distracting or not terribly educational, but I never felt strongly about the electric map. I'd seen the show a couple dozen times before I saw one of the last ones in 2008, but I feel more strongly about the entire old VC being taken down (ah, the smell of millions of visitors over tens of years that permeated the inside of the building!) than about just the electric map being gone. I can understand, though, how some people might feel otherwise, especially if it was your first experience with Gettysburg, and it would be a good nostalgia piece somewhere else, if anyone cane ever get that going.
Now the Cyclorama--that's a whole OTHER story!