They have been asking for it !!

Summary

Service providers, network customers and data center operators have clearly communicated that higher data rates are required for client links to support higher data rates on the backbone networks.

These next generation data rates need to be implemented while also addressing challenges associated with power dissipation, density, performance, reach and cost.

In addition, compatibility with legacy data rates and networks will be required in many applications.

These goals can be achieved by having consensus amongst a broad cross section of component, subsystem, and system suppliers to leverage new technologies that drive signaling, architecture, and integration developments.

As has been demonstrated in the past, most recently at 100Gb/s, the OIF is proposing to play a key role in coordinating industry activity to identify and develop critical technical solutions that will enable next generation data rates to be cost effectively deployed in the development of next generation equipment and networks

A long document... but it clearly states that the industry is looking for a new standard !!!

http://www.oiforum.com/public/documents/OIF-FD-Client-400G-1T-01.0.pdf