If publishing company Penguin's impressive iPad demos weren't enough to convince you, this extremely clever video (originally made for internal purposes) will show you that at least one part of the publishing industry has its head squarely on its shoulders.

Just one thing: Make sure you watch the entire clip without skipping around...there's sort of a payoff halfway through that we don't want to spoil. [boingboing]

UPDATE: Check out the comments if you like the effect—it looks like this is a remake of another piece.