USB 3.1 And Its Disruptive USB Type-C Connector

[Solandri]

So will internal SSD drives use USB 3.1 (1000 MBs) instead of SATA III (600 MBs)?

Internal SSDs are moving towards the M.2 interface (which supports both PCIe and SATA). USB has too much CPU overhead and latency to really be effective as a communications interface for a primary drive.