Hmm, when I went to see the War of the Worlds two weeks ago, I noticed that the orchestra didn't have paper in front of them, but LCD screens... And I never saw them "turning" a page, so I assume it was all done electronically. There was a sort of clock (I've absolutely no knowledge of music and musical terms, especially for orchestras!) underneath it. I think the turning of the page was connected with that clock (I was sitting in front of the conductor (I believe it's called) so had a decent view
)