yeah I suspect a Vega clocked higher will edge out a 1080 (not the 1080 with the GDDR5X)
I see Nvidia refreshing the 1070 with the faster memory in response and cutting production on any 1070/1080 that does not have GDDR5X which should already be happening for the 1080.
All GTX 1080's has GDDR5X memory.
he talk about the one with 11gpbs, still i don't like amd cuz can't mine some low hash profitable coin like nexus spreadcoin veltor etc, their miner is not on par with nvidia for these coins, probably because private miners are a plague there more than nvidia
a mix of rigs is probably the best solution to always be able to mine the hot coin.