My guess is that its not the bluray format itself but rather something behind like ways of extracting the data from the disc & special extended features.
The patent system for todays tech is flawed, it allow for wide-area generic patents that can then be trolled/milked for years!
Kinda fun that Sony who heavily enforces that no one should abuse/pirate their stuff and spend millions upon millions to stop it now is the company engaged in abuse of another company assets!
Hope they get flamed really hard, with all the shit like securom, rootkit software installs to allow a music cd to play ect they put their customers through in the past - I for one just enjoy reading this! Only part i feel sorry for is the kids who wants a console to waste some money on!