A while ago I was demonstrating Turning the Pages to Mervyn King, Governor of the Bank of England (he looked a bit chirpier then).
I showed off some of the features and, impressed, he asked "How do you do that?". I didn't want to go into specularity mapping, polygon vertices, web services and the like, so in an unguarded moment I said "Well Governor, it's mainly done using magic". Luckily he and his entourage laughed.
He then came back with "We in central banking generally don't hold with magic".
My company have built some software that creates such a convincing illusion that people are confident the book is real. If the governor could summon the same confidence now, that would be magic...