>"Their data can be restored more quickly"
Than a hard drive? I think not.
> "the Blu-ray system doesn't need to be powered when the discs aren't in use, it uses 80% less power than the hard-drive arrangement, cutting overall costs in half."
Say what? When my backup hard drives are not being used, they also use zero power because they are not plugged in. And when they ARE plugged in, they "power down" after a few min of no usage, which I think is like 1% of normal power.
The density of storage for bluray is also not better than hard drives, and the writing is much slower. I also don't see how transport is so much better than laptop hard drives. Bluray MIGHT be cheaper, depending on how you value your criteria... and the discs are more rugged (if that even matters).