You wanted predictions? Well strap in for a rambling coffee fuelled tirade brought to you by stupidly little sleep. Please excuse poor spelling, punctuation and grammar. I'm bad at the best of time, and this is not a good time!
Now, Vega RX cards, within 10% of the GTX1080, will it impress your pants off? Hell no, it's going to be a worse Fermi, hot, power hungry and slower than the competition. Fermi was at least faster than ATI/AMD back then. Hopefully AMD will survive and move upwards and onwards to Navi. Navi is probably going to be disruptive, but less disruptive than I thought 3 days ago. Now, in an AMA over on Reddit, Raja (y'know the lead engineer guy for Vega), said that Vega is the first InfinityFabric GPU.... What could that mean for Navi? Well, there's one big hint from the Capsaicin conference AMD held back in March this year. Scalability. What was one of AMD's big things when they've been talking about Ryzen and Epyc? Scalability. Vega, first step on the road to a scalable GPU in line with Ryzen. InfinityFabric on the GPU, that is how AMD intends to leapfrog back into the high end GPU market.
Now, I mentioned that I thought Navi would be more disruptive 3 days ago. That is because it just came to my attention that Nvidia has released a whitepaper on MCM-GPUs, or Multi-Chip-Module, and to be frank(no I'm not Frank, bugger off) it looks a lot like InfinityFabric. Not to say that Nvidia didn't cook this up on their own, but the timing is... Suggestive.
So I guess it comes down to this, who can release MCM-GPUs to market first, AMD already has the technology on the CPU, does Nvidia have it in a lab? Will InfinityFabric adapted to the GPU scale as well as IF does on the CPU(Near perfect scaling!). My prediction at this moment in time is, 2017 is definitely coming on strong as the year AMD takes back some share in the CPU market, will 2018 look the same for the GPU market? (Roadmap from Capsaicin conference shows Navi release first half of 2018)
http://i.imgur.com/85z2PvY.jpg <- Roadmap from Capsaicin conference March 2017
https://www.reddit.com/r/Amd/comments/6bklro/we_are_radeon_technologies_group_at_amd_and_were/dhqo06p/ <- Raja comments from AMA thread
http://wccftech.com/amd-rx-vega-benchmark-leaked-specs-confirmed-1630mhz-8gb-hbm2-484gbs-of-bandwidth/ <- "Leaked" benchmark showing Vega RX slightly ahead of 1080 (there's more reason to belive this is accurate, but I'm detecting blood in my coffee circulation so the brain is throttling)
http://research.nvidia.com/publication/2017-06_MCM-GPU%3A-Multi-Chip-Module-GPUs <- MCM-GPUs whitepaper
https://static.seekingalpha.com/uploads/2017/6/71188_14966259679859_rId9.png <- InfinityFabric on Epyc (not the best image, but it gets the point across)