Broadway Musicians Replaced With Synthesizers
No, you are watching another human perform something. That is what is interesting, and while watching you could think to yourself, how would it feel if I was doing that...? With a machine you can't do that - because a machine does things differently then you.
Steve Jobs Patents "The Dock"
Actually yes, in my CS Human Computer Interaction course, along with many other UI approaches that are now being introduced into the mainstream.