The Seagate Free Agent GoFlex Docks were an excellent product, allowing interchange of hard disk drives and connectivity protocols. They made USB 3, FireWire, and even NAS docks for these hard disk drives. But the connector is standard SATA and could be used with any drive. So I created a 3D printable adapter and released it on Thingiverse!
Increasing hard disk drive density always brought better performance, and Seagate’s use of faster spindle speed will help as well. My only concern is the increased heat generated by these new drives: My GoFlex Desk drives are definitely hot to the touch when in use. But the availability of 3 TB drives is to be welcomed at this price point.