Re: Blu-ray technology
You will have to wait for someone to invent hard drives as cheap, durable and disposable as CD's DVD's and other recordable media.
-Hard drives have moving parts and hence short running lives as compared to many other recordable media.
-Hard drives need their own power source to be able to extract data from them. Recordable media doesnt.
-If you want to make copies of data from a hard-drive to another hard-drive you know you need so much additional hardware. Compare that to copying cd's and dvd's
-One can say that Flash drives eliminate the problem of moving parts but they too arent safe from magnetic fields.
So basically as long as there is need for convenient long-term data/music/movie storage on cheap and disposable media, CD's DVD's Blu-ray will not go out of fashion. They might get replaced by similar media able to hold more data but the genre will remain.
Hard drives and flash drives can be considred good for short-term storage or media thats in transit.