I'm 100% in favor of real sets. And real FLOORS! Also, and I'm sure plenty of people will disagree, but I see physical sets being more necessary when filming digitally. The digital camera picks up so much detail and light, that a bluescreen backround doesn't blend well at all with the actors (most of the time). An example of this is virtually all of EP 2. It just looks fake and terrible, especially the scene in the ground floor of the Jedi Temple. That, to me, is the worst effects shot in the entire saga.