Dr. Evil said it best. Those who build there own PC's have no reason to put in a DVD drive.
For instance my mother in law who has no clue about computers and hates computer games has a DVD drive in her computer. My dad nearly 60 never played a computer game in his life has a DVD drive.
But myself and two of my best friends in our upper 20's who play computer games religiously. Buy new games at least one or two games a month, build our own computers piece by piece don't have DVD drives. We have a DVD player hooked to our respective entertainment centers to watch movies. But since there is like no DVD games why would a gamer have a DVD drive?
Plus if I remember correctly all the really bad games on the original CD's were all the bad games that were really movies with no gameplay. It took a while for actual decent games to start coming out on CD.
I'll wait until something good comes out on DVD before I put one in my computer. Until then I'll just stick with my trusty CD-Rom drive.
Laffman.........