Who would really want a writable DVD to replace a floppy? Why do I need a 4.7GB disc to hold onto my BIOS upgrade when I flash it? Or my RAID drivers when I install Windows (especially since current Windows installers ask for a floppy)? Granted, for most other purposes a floppy is mostly not efficient. But there are likely plenty of times when a floppy is all that is needed. There is too much "Bigger, better, faster, more..." When sometimes, 1.44MB is more than enough...
[EDIT} I hate floppy drives, but I see no real need for something gigantic to replace them.
\Dan