In next year will be holographic drive

Not usable instead of hard drive, information can be written only once on that new medium, but it should be much much bigger than cd, dvd and even hd-dvd (or blu ray..). But it sholuld be excelent data storage, because size (from start they promise 300gb per one medium) and speed, due to reading much more data in single moment, it should provide them by speed of 120Megs per second. Interesting, but how much it will cost?