As I recall there were two models of the WD TV Live Hub sold. In the U.S.A. a 1 TB version. For overseas there was a 2 TB version. And as the line was being drawn to a close I think I saw the 2 TB versions being sold here in America.
If WD releases a revamped version of their Live Hub I would buy another iteration of it if it had the following:
4 USB 3.0 ports
dual HDD bays
6 TB internal HDD
built-in Gigabit speed Power Line Network Adaptor with 4 LAN ports (Gigabit speed on each)
same set of A/V connectors plus VGA
Supremely faster CPU for moving, copying, etc data to/from the internal and external HDDs
Easy to open and upgrade internal components (RAM, CPU, HDD, etc)