Here's a Blu-Ray fact they don't tell you
I have learned that not all BluRay discs are playable in all BluRay players. Since the technology is still under development, and new "features" get added to enhance viewing enjoyment, players often are unable to read the disc properly.
My BluRay player requires "firmware" updates loaded via a thumb drive. The time between when a disc is released and when the manufacturer (sharp, in my case) comes up with a fix to enable it to be played, can be several months.
Ain't technology great?