Let's not forget that moving to thunderbolt actually makes the whole machine MORE expandable, because of daisy-chaining. An existing computer may have somethin

Let's not forget that moving to thunderbolt actually makes the whole machine MORE expandable, because of daisy-chaining. An existing computer may have something like 5 PCIe slots. That's your limit. But with these thunderbolt ports, you can hook up 6 devices per port. 5 PCIe cards vs a potential of 36? I really don't see how the new Mac Pro is less extendable. In addition, now that there is no CD Drive, there's no longer any reason why this tower needs to sit where you do. You could theoretically have 40ft Thunderbolt cables drive your displays, and the computer can be neatly stowed away in another room, and just the interfaces (like these cool looking RME devices) and other monitors and editing equipment can stay on your desk. When it comes time to upgrade, you just replace the "brain", and hook up all the cables to it.