Though just the most basic of teases, AMD confirmed at CES that it will have a 7nm based Vega product sampling sometime in 2018. No mention of shipping timeline, performance, or consumer variants were to be found.
This product will target the machine learning market, with hardware and platform optimizations key to that segment. AMD mentions “new DL Ops”, or deep learning operations, but the company didn’t expand on that. It could mean it will integrate Tensor Core style compute units (as NVIDIA did on the Volta architecture) or it may be something more unique. AMD will integrate a new IO, likely to compete with NVLink, and MxGPU support for dividing resources efficiently for virtualization.
AMD did present a GPU “roadmap” at the tech day as well. I put that word in quotes because it is incredibly, and intentionally, vague. You might assume that Navi is being placed into the 2019 window, but its possible it might show in late 2018. AMD was also unable to confirm if a 7nm Vega variant would arrive for gaming and consumer markets in 2018.