Some of this makes sense, some of it not.
I think AppleInsider is right about the case. With the exception of the MacBook, whose design has been rumoured for years and clearly was something Apple would have done even had this been the "iBook G5", Apple has made it a point with all of their Intelizations to use the same case as the predecessor, as if to say "It's business as usual, all we've changed is the processor." So from that point of view, the PowerMac G5 case being, more or less, the Mac Pro case, makes a lot of sense.
Two optical drives? No, sorry, not seeing the reasoning. The reasons given so far don't add up:
- copying DVDs - you can't legally copy 99% of DVDs anyway, if there was no need for twin CD drives, why would there suddenly be for DVDs?
- burning two at once - few people need this, and it's a great sales opportunity for a Firewire external burner anyway. Hell, why stop at TWO?
- Blu-ray - not unless they're really screwed up BR and drives with BR will be incompatible with existing media or something.