If I could guarantee that BlueRay was going to be a medium everyone would still use in 20 years, I would buy the shows I would want to easily share with friends "Hey, you haven't watched breaking bad?" **hands them the box set from the shelf** "enjoy".
It's much easier for people to not have to worry about downloading something or finding good quality versions and their much more likely to watch and enjoy if they have the physical copy from a friend.
Breaking Bad, Sopranos, Boardwalk Empire, Lost, Six Feet Under, Star Trek TNG, Monty Python Flying Circus, The Mighty Boosh.