Im in the market now for a new External Harddrive Array for editing, and you can bet your money it will be a Thunderbolt Drive. Many of my archive videos are HD. Many of them are 4+ Hrs long. Yes, I have several TB of Data I need to have access to as well as back up & move occasionally.
There is a really good article over on Gizmodo about Thunderbolt vs USB 3.0. Thunderbolt interfaces are now available for PCs, as well as Mac users. Thunderbolt is BLISTERING faster.Thunderbolt vs USB 3.0