CG does look fantastic when done properly but when they use it to break the laws of physics like Legolas in Desolation of Smaug it just looks way silly. That is what I don't like about CG.The fact it makes some film makers go over the top with scenes just because they now can. Some modern CG is just jaw dropping good though and I think The Force Awakens will showcase that as well as bringing back some wonderful practical sets instead of just a sea of green screen actors can't relate to. So there's arguments both ways.
Ben
Ben