@Onyxmeth: That was my original idea. I should have put it in the OP in the first place.
Basically the comparision with the PS3 game releases and BD movie releases, you mentioned, would indicate that PS3 has impact on the releases, but then again, the early BD adopters could just as well be in the same age and sex group (even with little overlap).
@Munkeh: No, BD isn't an added bonus. It's a cost increasing feature, whether you wanted it or not.
Yes, Sony wants to sell more of their consoles, wants to profit from them and the price will go down along with the costs. But, selling a PS3 instead of a BD player, where BD player would profit more, isn't actually a great businessmodel. Also, nothing guarantees that PS3:s bought as BD players will be used for games, where they aren't making any money from games. The ultimate business strategy would be to sell a games console and a BD player and profit from both.
We don't know that, you're right. That's why i mentioned where they traditionally are placed. Also, the games library is heavily geared towards teenagers, which would indicate that the consoles can be found from the kids rooms, when DVD would be more propable movie format used. Of course, i've noticed that it's becoming more common for stores to market PS3 as a BD player and a gimped PC.
Problem with attach rate is, that we don't have anything to compare it with. Or maybe the DVD attach rate? Also the "X number of BD movies for PS3 buyers" -bundles are gearing the attach rate up, since you got the movies even if you didn't want to or never bought BD movies outside the bundle.