We've just heard some juicy details on AMD's next-gen Vega 10 and Vega 20 graphics cards - with 16GB of HBM2 and 32GB of HBM2, respectively. But it's the news on Navi that has me even more excited, and simultaneously disappointed.
VideoCardz.com's source says that Navi 10 and Navi 11 are "currently planned for 2019", meaning that AMD has delayed Navi by 12 months from its original 2018 release, and now into 2019. We haven't confirmed this yet, but I've sent some emails and will update this post when we hear back from someone at AMD.