Unfortunately all I've seen as well are signs pointing to 2019. i.e. Ryzen 3xxx, Navi, blah.
I don't believe I'm alone with holding out on a large investment system upgrade when these are apparently not that far off. I just hope this doesn't keep dragging out and as the standard was progressively refined over the years, I find it disappointing to have a 1.5 - 2 year gap in product releases.
I'm having no hope for Zen+ boards to supporting this, so we'll be waiting for another year?
So disappointed right now.