I was thinking about the evolution of Macs, specifically USB3

[Lew Zealand]

Gareth wrote:
[quote=AllGold]
Obviously, unlike Apple's other machines, you can add a PCI card to a Mac Pro if you want USB3.

And any machine with Thunderbolt can add USB 3.0 via a dock or adapter.
This is a key option, I have 2x port powered TB1-USB3 dongles from Kanex. I have 3x 2011 Macs so these are very nice when needing that speed.