on the note of the blu ray storage sizes, hd movies take up alot of room, 54 GB will be needed to store around 4.5 hours of high def video, so beging that the blu ray disks hold alot more than standard dvd is a big thing. especially that in the near future more and more things will be high definition check this link Howstuffworks "How Blu-ray Discs Work"
The only thing with the +/- war was that DVD on film had already adopted a standard with all studios backing it so the war only really affected PC's. As far as storage goes using VC-1 takes up 6.25GB per hour so a 4 hour movie your looking at 25GB which even with HD-DVD leaves 5GB for aditional material. BlueRay when it launches will still be using Mpeg2 and using single layer discs which pretty much negates the whole space advantage as the movies will require twice as much storage to store the same quality picture. If Sony is able to get their VC-1 encoder perfected and able to produce a real world dual layer disc BR has an advantage presuming studios are either able or willing to take advantage of the additional space but as of right now it looks as though HD-DVD has the advantage. Fair Dislcosure: I own a Toshiba HD-A1 right now and have the Samsung P1000 on preorder (So I'd hope I'm fairly neutral on who wins the format war)
