Ah, holographic storage -- you've held so much promise for cheap optical media since you were first imagined in research papers published in the early 60s. Later today, GE will be trying to keep the dream alive when it announces a new technique that promises to take holographic storage mainstream. GE's breakthrough in microholographics -- which, as the name implies, uses smaller, less complex holograms to achieve three-dimensional digital storage -- paves the way for players that can store about 500GB of data on stand