this breakthrough in our understanding of DVDs is just the beginning. The researchers say their work – which is also applicable to the alloys used in Blu-Rays – is going to pave the way for even better forms of optical storage, with longer life, larger storage capacities, and shorter access times
http://io9.com/5729882/it-took-a-team-of-physicists-all-this-time-to-figure-out-how-dvds-work