I just heard about this today, can someone explain what it is, and why one would use it?
thunderbolt has its niche uses:
laptops and small form factors, eg this Intel NUC http://www.amazon.com/Intel-Next-Com.../dp/B0093LINT2
thunderbolt is essentially an extension of PCIe lanes (and displayport)... desktops HAVE pciE slots. laptops/SFFs don't. what happens if you want access to PCIe lanes (for fast SSD or external GPU)? use thunderbolt