I think motion-capture actors should be called "puppeteers" because, in a very real way, they're moving a virtual puppet around. To apply terms like "virtual actor" to the combination of human and digital effect is a bit overblown, in my mind.
Mokalus of Borg
PS - It does kind of broaden the definition of "puppet" though.
PPS - The world changes, though. Its words should change too.