like chuck says it's only cd to dvd next is blu-ray ...
At the mo - the round thing is the same size .... so no problem
if the next doo dah is a pluggy inny thingy
then that will end the optical disk trend.
if you are thinking of buying I remember when a dvd burner cost over �500 - same now for blu-ray give it a while and they'll be down to �20 or �30
and the disks will be given away in the sun