http://en.wikipedia.org/wiki/Holographic_Versatile_Disc

I was Wiki-surfing today about interesting topics and came across this. This disc uses holography to store data and is based on volume-based reading rather than surface-based reading like current media discs (3D as opposed to 2D). HVDs can apparently store 1 to 10 Terabytes of information.

I also read that potential write speeds are 1 gigabit per second and read speeds are 1 terabit per second for related media.

Quite interesting stuff! Although it says that they probably won't market them until 2019-2020. It's a considered media storage device for Ultra HD Video. Whenever that happens. Another storage media considered to be the next media standard is the SVOD.