I'm seeing quite a few machines on sale these days that have ditched the floppy drive completely in favour of a 6-in-1 media reader. I think the ability to boot your machine from a cd/dvd and larger storage and reliability available on cd-r/rw and usb connected flash and hd drives have finally combined to make floppies redundant. Thank god, cos I hate the damned things.

Given how long dvd-roms have been standard on new machines (err...4-5 years now?), it's getting to the time when you can expect most of your market will have dvd drives. They will lose those people who don't have dvds, but it might not be as big a number as first expected. I can't think of a single friend or family member who doesn't have a dvd-rom in their machine, whether they play games or not. Having said that, it is still surprising for it to be
only dvd. Personally I hope it's the start of a trend for (not exclusive) dvd releases - fewer discs to lose/scratch/change during play...
There's also the comparative cost. IIRC it costs more to press a dvd than a cd, but dvds are more cost effective when you've got large amounts of data to store. Could be the increasing size of games that becomes one of the driving forces behind the likely eventual demise of cds?