Apple simply won't. After offering up a 2x Blu-ray burner for the Mac Pro and Power Mac G5 last year, the company is keeping up with the industry by introducing a 6x variant for the very same machines. You'll also find compatibility with BD-RE (2x), DVD±R (16x), DVD±RW (6x - 8x), DVD±RW DL (4x), CD-R (40x) and CD-RW (24x). The drive itself is available as we speak for $499, while a bundle with Roxio Toast 9 Titanium goes for $599 and an external version runs $749.
[Via The Mac Observer]