Good for Apple. It is true that this will limit other companies' use of this alloy but the fact it, if Apple hasn't done it, none of them will.
Just look at how Apple revolutionize the market with iTunes’ $1.00 per song, the iPod, and iPhone's multi-touch. If it was not for Apple's willingness to risk it and back it up with marketing money, we will still be using Blackberries and $16.00 CDs.