7nm will almost certainly be the starting gun for the next generation of consoles, so I guess this will push them out to at least a 2019, probably 2020 release.
Judging by recent roadmaps from AMD and Globalfoundries, it looks like there will not be any EUV until around Zen 3 and the generation after Navi.
Glofo's 7nm will only get EUV tech when they create their second and third generation 7nm nodes, which is likely what AMD refers to when they talk about 7nm+
This means that Navi and Zen 2 almost certainly be made on their vanilla 7nm node, which is fully DUV.