I think it's a good point, too, that the market has not moved to High Desnsity discs (HD-DVD/Blu-Ray).
I don't have either of the players, and don't mean to until I know there is a solid format with staying power. DVD sales are strong, and there really is enough room on game discs (for now...today) so long as game companies don't go crazy with HD cut scenes.
Heck, by the time the format BS is settled, Xbox 720 and PS4 might be ready to go
Then they can include the right drive for the established format.