Mac Life has put together an interesting article on why we probably won't see USB 3.0 natively on the Mac. It's worth a read, but the long and short of it is this: Light Peak -- the ultra fast 10 Gbps, one size fits all (USB, Ethernet, FireWire, SATA and PCI Express) optical cable replacement that's been dangled before our eyes, but not made a reality, yet.
Light Peak was first demonstrated by Intel back in 2009 on a hackintosh running Mac OS X -- which ruffled a few feathers. At the time,