I appreciate the charts but has anyone actually managed to find out exactly what the data criteria is.

Call me old fashioned but my classical education taught me to list all relevant sources underneath the pertinent chart. Otherwise ignore the chart as unreliable.

This chart looks a bit like a classic marketing blindside.

I'll believe the numbers when I know exactly what the numbers mean.

Total revenue for each group.   Blu-ray numbers are total Blu-ray revenue for that week, DVD numbers are total DVD revenue for that week,  and Total Packaged Media is the 2 combined. 

So no marketing blindside or BS, this is the money that these 2 formats are bringing in on a weekly basis.  

thank's for the prop's. but Blu-Ray is also a holographic based technology:

look what GE did.

GE:

Globally Mobile writes"The Register has this article concerning GE's announcement that it has been developing a 1 terabyte DVD-size disk that can be read by a modified Blu-ray player. Peter Lorraine, GE's lab manager, talking at an Emerging Tech conference last week, said that license announcements could be expected soon. He also mentioned the notion of disks having the capacity of 100 Blu-ray disks, implying a 2.5TB or even 5TB capacity, gained by increasing the number of layers used for recording. The discs will be used for high-end commercial niches initially and then migrate to consumer markets in 2012-2015. Also here is a video of the technology explained. Wish we could see this sooner! Reminds me of the technology that Bowie's character came up with in The Man Who Fell to Earth."

http://www.youtube.com/watch?v=hXrJgXYq0Bk&feature=player_embedded

its indeed holgraphic based technology.

as this experiment showed holographic disc's can be read even by a modified Blu-Ray player.

You do realize that one of the lasers needed for HVD is a standard blu-ray laser? The modification they made was adding the 2 green lasers to read the holographic data. Without these green lasers it cant read the holographic ilayer.

A blu-ray disc is still based off old cd technology where all information is stored on 1 or 2 metal layers stored in the middle of the disc. HVD tchnology uses a holographic layer in addtion to 2 metal layers, which is why it needs the extra lasers. Not to mention the power out put needed for those lasers is ridiculous. So when they said "modified", they meant we changed everything to get it to work

 it was not everything.

yes I do in fact know that it requires those green laser's. 

hell if you want to be realistic about it even holographic disc based technology is based off OF old CD optical technology.

look were splitting hair's here. the truth of the matter is

that through optical technology experimitation evolved , but just like a blu-ray laser is a combination laser it's not that far fetched to include the added laser's in order to read holographic disc's,they did not change the core function, let me ask you this would that Blu-Ray player still be able to play blu-ray disc's?. the fact that GE used a modified blu-ray player was no coincident.

the core technology is still the basis of it all boil's down to quite a few factor's but still the same principles.

its like the first automobile is in principle the same as it is now as it was back then , its just through the maturity of the technology and advancement's we have gained that the evolution of said automobile has progressed.

why don't you guys start a new post. That list is ridiculously long.

But we arent argueing that HVD is a cd based technology, we were argueing that Blu-ray is or is not an HVD type technology. Sure in the end it is all optical media but again thats not what the arguement was. Blu-ray has no hologaphic data layer, only mulitple metal layers, it only has one laser as well. And yeah the modifies everything, they has to up the drive motor for faster spinning speeds, the had to add 2 additional lasers, and had to up the power supply within to accommodate the highe powered green lasers. The only thing left over that even resembles the blu-ray drive is the disc tray and the blue laser they are using.

but that is the thing, your saying that Blu-Ray is not a holographic base technology, but without the technology would there be any HOLOGRAPHIC DISC based TECHNOLOGY? there is many type's of HOLOGRAPHIC BASED TECHNOLOGY.

example you can just use a Blue laser to read or write hologram data with red being used for addressing:

(1) (High Voltage Differential) See SCSI and differential signaling.

(2) (Holographic Versatile Disc) A high-capacity optical disc from the HVD Forum (www.hvd-forum.org) that combines single beam holographic storage and DVD technologies to provide cartridge capacities reaching 1TB and beyond. Formed in 2005 as the HVD Alliance, the first HVD standards were released in 2007 for 100GB read-only (ECMA-378) and 200GB recordable (ECMA-377) formats.

HVD uses the conventional CD/DVD pit layer for addressing the disc, on top of which is the holographic recording layer. A red laser reads the addresses, while a green or blue laser reads and writes the holograms.

Single Beam Holography

Throughout the history of holographic storage research, two separate laser beams have been used to write the holograms at the intersecting point. Using Optware's Collinear Holography, HVD combines the two lasers into one lens, which reduces the size and cost of the mechanism. Seeholographic storage.

example:

We hear about holographic storage time and again, but look around — do you see any holographic drive arrays around you? Didn’t think so. At the moment it’s just not cost-effective (compared with plain ol’ HDDs) and not fast enough (compared with SSDs and other flash arrays). That doesn’t mean it’ll be an exotic technology forever, though: GE is hard at work making it more compatible with existing technology, and thinks they’ve come up with something good. Their optics labs have increased reflectivity in their media to the point where a standard Blu-ray laser can be used to read them, though nothing is said about writing.

The resultant discs, the same size as CDs and DVDs, would be able to hold 500GB at current densities, going up to 1.6GBTB in densities achievable in a year or two. What does this mean for you? Probably nothing, but it’s good to know they’re all hard at work, right?

Maybe in 2011 you’ll be able to buy a modified Blu-ray drive (assuming the format is still around) that will have a mode for reading these holographic discs. You might even be able to get a special drive to write on ‘em. Seems a bit weird talking about “next-generation” optical technologies when almost all media is going online, but there’s always a use for discs like these. Assuming the discs aren’t too volatile, this kind of storage capacity would be great for backups.

Aaanyway, don’t worry your little head about it. When something happens, you’ll know (because we’ll tell you). In the meantime, get your holographic storage shirt here.

^^
I imagined something like this, now it's more clear: it isn't that BD is holographic, BUT they devised an implementation of holographic storage that requires a lot less modifications than before to existing optical drive technology and makes also easier and inexpensive back compatibility.
IMHO this, more than making HVD's road a lot easier, puts it slightly better than on a par with the difficulties met by BD, as it had too a quite inexpensive BC, but it took some time anyway to get inexpensive its new parts too, in this case the hurdles about laser emitters cost are already cleared, but those about the new optics and media are still there, and regarding media, they are bigger than those met by DVD and BD, that were quite linear evolutions from previous optical formats.

that's the point, BD is a TYPE OF holographic disc technology. it is not the same as GREEN based laser holographic technology but it's its own type.

there is no defacto Holographic Type.this is just another way that the Implementation of how each of those optical technology's are used.