My Mac Pro came with a SONY DVD burner, but it was a generic NEC
in disguise. Flashing it to it's RPC-1 NEC variant even unlocked additional
functionality.
They haven't spared any expense with the PRO. I AM surprised to hear it came with a flashable firmware. Apple have always gone out of their way to prevent that.
It depends on what you wanna do. If you want to do high def video
rendering you'll need a Mac Pro with a video processor card like the Kona Aja.
For other things, any Mac will do. For portability a MB would be best.
They say the future is portable, so that's where they should concentrate.
People don't get it that the OS and choice of Apple pro-apps are usually the best reasons to get a Mac.
As I suggested, Apple knows that people want the OS, even if it means losing something else, like on the iMac and Mini (most affordable). And if they want portability, then the books. Leaving out BR was a mistake in my view.
I don't think any hardware buyer wants to feel restricted and Apple has done that with their machines - limiting the choices.