The goal is also to get Windows 8 on as many machines as possible. If removal of the feature reduces the licensing cost for 90% of the install base, which doesn't give rat's * about DVD playback capability, then it's a move that most people should be supporting especially since it reduces Microsoft's own bloat, which isn't without a considerable amount of criticism in it's own right. The other 10% can still purchase the capability or find free options.
It reduces it for Microsoft, not for us. I don't see them lowering the price vs Win7.