Well, I predict Blu-ray isn't going to have a long lifespan anyway because there are things like Protein-encoded Discs and Holographic discs which can hold like terrabytes of information on a single disc. Blu-ray discs weren't really needed for HD content, because that could have been accomplished on regular DVDs with the aid of compression. If you ask me, the only reason a new HD disc format was invented at all is because the movie industry wanted to stop copying of their films. Now that BLu-ray encryption has been breached it really no longer serves that purpose, so they will probably aim for something new in another few years.
Blu-ray won the war against HD-DVD, but it doesn't matter because their generation isn't going to last long anyway, imho.