I think the most exciting thing about TB is being able in the future to buy a box full of PCIe slots. So imac owners can upgrade their video cards and other internal gubbins which are at the moment unreplaceable. One company whose name eludes me at the moment are supposed to be releasing a rackmount unit this month which contains a mac mini and several PCIe card slots. Amazing.
I thought the point of an imac was to NOT have cords everywhere.
Kind of looks like a return of the desktop...