It always surprises me how people just assume that they'll get some special kind of treatment (discount or whatever) towards the next iteration of a product that you own. Granted Apple did go and offer a rebate when the prices dropped, but only because there were a lot of angry customers, and their stock prices took a hit accordingly. (remember it's all about making money)
Do you think when you buy a Ferrari and it's replacement comes out a few months later, that Ferrari will offer some sort of discount on the next one? How about that new plasma that you got, and it gets replaced in 6 months, what is Sony going to do, offer you a rebate on the new one?
Think about it.......