You may remember Tony Davis as the guy who explained to us why popcorn grease is destroying movie theater projectors. (He also had lots of interesting thoughts on 3D and the economics of the theater business, but mostly, judging by responses I received: popcorn grease.) He’s back this week to explain why the home theater set you can build in your home looks about as good as a standard (read: non-IMAX or Dolby) theater. (Whether or not it sounds as good is a separate issue.) And he has a few suggestions for theater owners as to how they could step up their game.