Thunderbolt is in actuality PCI Express and has ample (20 Gbit/s) bandwidth. As far as I know it will be almost like directly attaching a GPU with some minimal

Thunderbolt is in actuality PCI Express and has ample (20 Gbit/s) bandwidth. As far as I know it will be almost like directly attaching a GPU with some minimal latency because of the greater distance. If not, the next gen optical version will have more then enough headroom.