Well, for one, what's the product differential? DVDs are movies on disks, Blu-Rays are movies on disks. Movies? Maybe Blu-Ray is better suited to archival apps?
Second, you play DVDs in a DVD player. I have one of those. But you play Blu-Rays on a PS3. Say what? Blu-Ray is just a game format? Ok, I get it, but why should I buy another player to watch Blu-Ray? Just so I can buy the White Album again?
Third, my daughter won't touch Blu-Ray, and she's in high school -- cool by definition.
Personally, I think Blu-Ray has missed its niche. Leave it to gaming, but design for the massive production values the medium is perfect for. I would love to see Square-Enix actually building fantasies on an unfettered planetary scale -- with, say, seamless pathways to approach the same character's emotions from nine directions, like flying/walking/swimming/riding/motoring over the same landscape that NEVER gets linear. Could we have that, please? A game in which "Nothing is Written?" A game without unevolved context-free monstrosity that owes more to drugs and STD's than anything remotely (r)evolutionary?
Put that on Blu-Ray and smoke it!