If you stood me in a costume next to a computer graphic of the same-looking character, I think there would be a difference. And many movie fans I've spoken to would rather see an actor in a costume than CG.
“What we find is that our brains have colossal things happening in them all the time.”
“All earthly delights are sweeter in expectation than in enjoyment; but all spiritual pleasures more in fruition than in expectation.”