Isn't BR cracked already, and that it's the ps3 architecture that prevents piracy?
If so, I don't really see any need for them to go blu. There are probably rival formats to consider like flash and such.
PS: I really really really hope games go back to carts. The speed and storage capacity of flash is so amazing and cheap right now, that in the future couple years, carts will be perfect for console gaming again. Sure, it's not as cheap as BR or CD, but a 10-15GB flash stick could be viable soon. I wonder if Nintendo is contemplating it for the next console.