To me, it's funny that commercial blue LEDs, essential to both HD-DVD and Blu-ray, aren't even that old and they've already been out done by optware's Holographic Versatile Disc (HVD), an all around better format. 1TB capacity 1GB/s read/write speed, and backwards compatability with CD/DVDs. It has the data density of VHSs and the seek speed of DVDs.
The problem with HD-DVD is it's capacity. The problem with Blu-ray is no backwards compatability, and in it's roadmap SONY plans to double the data density and read/write speed of the previous discs at least 3X In Blu-rays life.The only problem with HVD is nobody knows about it.