>Microsoft has worked for many years on their glass memory devices, which have much more important advantages, and they are still far from being able to sell such devices, mainly due to the cost of the required lasers, for which there is a chicken-and-egg problem

So what's the deal here? I've tried reading about these devices, but MS's web pages are a little sparse on info and nothing's changed much in years. I guess the lasers used in BluRay burners aren't powerful enough?