He also said that there is a third group of fans, who are little kids and only know the franchise through the Clone War cartoon. Scary thought. There's like four generations of Star Wars fans now, no wonder the fandom is so fractured.
As far as a Saga boxset, LFL people have been pretty explicit that they are holding that off until they can do some super-elaborate release thing. The trilogy boxsets are just barebones, discount-priced things to make some money in the meantime, I wouldn't read too much into that. I could see them releasing seperate trilogies on BR afterall, but I doubt the current existance of DVD trilogy sets is any indicator of that. I doubt Lucas even knows those exist--he stays out of company business except for special releases as far as I can tell.