That is what I have been expecting from the start, a 1080 competitor, if we're lucky, possibly better than a 1080 by 5-10% overall.
Problem there is nVidia has the scale of economics on their side with the Pascal cores and by all accounts has been holding back a top to bottom refresh with 12Gbps GDDR5X. Which they'd be able to price anything AMD can do with Vega out the market if it doesn't come out the gate with game changing performance.