Just had a thought ( rare event ). Flash memory , currently up to 12 gb. potential of 137gb .How long before flash gets up to 30gb ish . Bomb proof . I am sure one day, not too far in the future, we will laugh at shiney disks . Content on a computer at point of sale ie." video shop ", "tesco" etc. Transfered to flash device in minutes . No moving parts anywhere .Closer than you think !
http://www.compactflash.org/faqs/faq.htm
http://www.compactflash.org/faqs/faq.htm