An official IEEE P802.3bs Task Force has been formed to develop a 400 Gbp Ethernet standard for 100m over multimode fiber, as well as 500m, 2km, and 10km over singlemode fiber.
A number of technical and architectural issues, as described in this video, are up for discussion in the Task Force.
John D’Ambrosia, Chairman of the Ethernet Alliance and Chief Ethernet Evangelist at Dell, is looking for ratification in early 2017.
See video: http://youtu.be/_iUoYwohzeM
