Blu-Ray is still too expensive, check what happened with playstation 3. They had to bring the price down to sell more units.
Imagine what the price of the Mac Pro would be with a Blu-Ray drive.
I don't think Apple is ready to jump on the bandwagon...
Maybe later in 2008...
But if you look at the prices on some standalone BluRay, I don't see why Apple can't offer it as a built to order option... I mean they stuff the machines with so much high tech stuff, how about adding something that can at least give us some form of enjoyment watching Blade Runner on BluRay on a the biggest Apple Screen or a 50 inch LED Screen.... ANYTHING....
Yeah... I know, moaning and bitching about it won't make Apple change their minds... I just think their computers are lagging in many ways...
I mean we can see Laptops with HD drives... why oh WHY doesn't apple have this?