http://www.youtube.com/watch?v=8RTkNJDMzugActually, Gigabyte has shown an external enclosure using a pair of Thunderbolt 2 links. That brings the speed up to beyond where a PCIe 2.0 x4 link would be, which has been shown to only hinder performance by about 5% in most single card cases. Just because graphics cards are given 16 lanes at PCIe 3.0 speeds, doesn't mean they have a use for all of that bandwidth yet. The point is to allow a wider array of configuration options for people who purchase laptops or low powered desktops, but as jasonelmore pointed out, Thunderbolt is hardly being used to make cost-effective devices.The majority of Thunderbolt connectors are on Apple devices, and from the look of the device pictured, I would suspect the manufacturer wants to take advantage of that crowd.