Optical drives need to be kicked to the curb! Flash is the next-gen future.

[NJ5]

For comparisons sake the cheapest SD cards are now $6.75 for a 4gb SD card, and $13 for an 8gb card and $24 for a 16gb card. But give it a couple of die shrinks and your 16gb card should cost less than that 4gb card.

That's still not very optimistic if we're talking about a cost multiplied by the number of copies of a game...