They will need to do better than that....
"Toshiba is targeting 2016 to introduce BPM technology drives. We might expect to see 4TB, 2-platter, 2.5-inch disk drives from Toshiba then." Given that there are 3 TB drives available right now (Yes is the 3.5 inch form factor), a 2.5 inch 4 TB drive being introduced in FIVE years time would be laughed off the market. SSD's will also be far more popular and cheaper by then. Maybe not affordable 4 TB SSD's in 2016, but I'm sure I'll be able to afford a 1TB SSD by then.