This is a technology that's very much worth the wait. It is a wire extension of th PCIe bus, so it allows all the elements of a computer to be distributed around the room. Graphics processors, storage, processing units... you could, in principle, carry around a featherweight Macbook Air, then plug in your Thunderbolt cable and have it hook up to additional CPUs, graphics engines and storage resources. This has the potential to totally eradicate the division between laptop, desktop and high-powered workstation computers.