Cool! I was wondering when we'd see those.
I read about holo-discs in New Scientist a little while ago. The ones on the article were for corporate computing and could store up to 250 TB. One was still a prototype and had a really fast read rate (something like 12GB per second), but not as much capacity (about 120ish TB), the other one was ready for release at time of print, had an enormous storage capacity, but had a much slower read rate.
The differences were down to how the read lasers worked.
The prototype had clusters of static heads that always accessed curtain areas while a second head moved round the disc, thus giving it a quicker read time.
The other one had a two axis head that could tilt thereby accessing different places of a holographic storage area in a given lane. It was slower at reading, but the holographic storage was genious, and basicly gave it two walls and a roof to store stuff on on every track, hence the massive storage size.
I'm still on the fence about blu-ray. I get what people are saying, but not sure of its worth the cost at the mo. Plus, even if your screen can do 1080p, all Blu-ray play at 720p anyway, if the sales guys say otherwise, they're not being straight with you.
with the potontial Holo-disc comming out, blu ray might be a short lived format anyway.
