Ofcourse they will. I mean, I don't think you can buy CD-ROM drives anymore, and sooner or later, they will all malfunction, forcing people to buy replacements. And since there are no more CD-ROM drives, they'll buy DVD-drives. And only when this happens, will games go DVD, instead of multiple CD-ROMs.
But I think that we haven't come to that time yet.
Tovi 
