I don't see how this is a revolution, first it was CD-R then DVD-R, and now we are on BD-R do we need a new bigger format, I say NO we don't. The problem now is that BD-R is expensive, and as we moved along in technology the main problem now is not the capacity of the discs but stability, archival problems etc.
Now that BluRay players, burners etc are cheep enough, we now need to see way more reliable media, and cheap prices. Just like with DVD-R that has more or less taken over CD-R completely. Even though CDs and DVDs will be around for a lot longer, why try and develop new optical media when the older technology works fine. Sure BluRay was a nice step in order for HDTV to move forward and all that.
Optical media just don't cut it compared to cheap harddrives, even HVD (Holographic Versatile Disc) hasn't made any real progress, and unless we get optical media that can hold 150-400gb data in a single layer in order to move from bluray (1080p) to 4k movies etc, I don't see optical media going forward in the future, any time soon.
I would argue that the most important thing for everyone out there is cheap, (also quality) high reliable BR-R media. Plus larger harddrives.