Here at Macworld 2012, Western Digital demoed a preview of their essentially finished, yet not final, MyBook Thunderbolt Duo. Scheduled to ship in Q1 for an "aggressive price," the unit plays host to two 3.5-inch drives, which'll come stuffed from the factory in either 4TB (2x 2TB) or 6TB (3x 3TB) configurations. On the outside, you're looking at the MyBook
