Holographic storage should finally come to market this Christmas, but at $15,000 for the drives and $180 for a writeable disc, don’t expect them as stocking stuffers, at least I can not afford it !!
Hitachi Maxell says that a 300GB version will ship before the end of this year, and an 800GB version will appear in 2008. The write-once media uses a special photopolymer that packs unprecedented amounts of data on recording material that is 1.5mm thick. Theoretically, consumer versions at lower capacities could fit 75 to 100GB of data on stamp-sized media.
This is how holographic technology works. From this, I remember one of my presentations that I gave in Third year of my M.Sc. corriculum which was for the same technology and which was in research phase at that time.