GE 500 GB standard-size disc?

Generic Electric labs claims that they have successfully tested to fit in 500GB into a standard-size disc. Is it true or a theory?. The new technology is called holographic storage, an optical process that stores 3D images and digital data together, encoding it all and placing it on light-sensitive material such as a DVD. The theory, holographic storage can pack data far more densely than current optical technology that is used in conventional DVD and Blu-ray

Here are some technical aspects of the technology according to Wikipedia.

The ultra high-capacity disc already has a brand name.

The Holographic Versatile Disc (HVD) is an optical disc technology that, in the future, may hold up to 3.9 terabytes (TB) of information, although the current maximum is 500GB. It employs a technique known as collinear holography, whereby two lasers, one red and one green, are collimated in a single beam. The green laser reads data encoded as laser interference fringes from a holographic layer near the top of the disc while the red laser is used as the reference beam and to read servo information from a regular CD-style aluminum layer near the bottom

Even this technology come sooner, you still need to buy HVD reader. Another costly investment.. so I think I will stick with my flash media :)