From the audience point of view, one of the big complaints about the increasing dependence on the use of motion capture technologies is that it's steadily removing human stars from live-action filmmaking and replacing them with soulless, digital simulacra. Of course, filmmakers disagree with that. Ask the Spielbergs or the Zemeckis' of the world and you'll be told that mo-cap and CGI take us beyond what humans can do in the real world.
Well, now filmmakers like Michael Bay and Jon Favreau are pushing that boundary even farther. As far as they're concerned, mo-cap isn't putting traditional actors out of work. If anything, they're trying to get humans to put inanimate objects out of work. Take a look.