Just like to make a few comments about MO drives.
MO drives are great, and widely used in Japan, and used to varying degrees throughout East Asia. I have an MO drive.
1. It's fast. Don't know the specs (they vary with each generation), but its essentially a USB 2.0 harddrive, with a slower seek time.
2. Durable. The disks last forever.
3. High capacity. 3.5 inch disks, but they hold anywhere from 640 MB to 2.3 Gb.
4. Low cost. a MO disk is comparable to a CD-RW in price (at most 2 times more expensive), but infinitely more convinent. The drives are a little pricey, since CD burners cost next to nothing now.
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I have no idea why the US doesn't use MO drives, but the US tends to skip generations of technology.
Examples:
VHS/(Beta) -> VCD -> DVD (US largely skipped VCD)
CD -> MD -> Mp3 player (largely skipped MD)
And, of course, cell phones and mobile devices. The boundaries between generations are less clearly defined, but you get the idea.
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So what does this mean for Blu-Ray/AOD? I think the discussion is meaningless at this point. Just like VCD and MDs, which offered no compelling advantage over VHS or CD, unless Blu-ray/AOD have something significant to offer, the Average Joe at Best Buy won't care.
Why would you need 30 GB? (Sounds like "why would you need > 640k RAM?") There's definitely an application, but I don't know what application that is. Until there is an application, no one will care.
Which brings up the PS3. If the PS3 uses Blu-ray, that's one hell of a way to force Blu-ray units out the door. Its also the application. Unless Toshiba can match that volume, and the application, Blu-ray will be the de facto standard.