Raja mentioned there, "if gaming is your primary reason for buying a GPU, I’d suggest waiting just a little while longer for the lower-priced, gaming-optimized Radeon RX Vega graphics card. You’ll be glad you did. " . So just wait for it, i guess..

In Vega Frontier Edition page they said this.
"To learn more about the Radeon Vega Frontier Edition graphics card, visit http://radeon.com/frontier and we’ll be providing further details by mid-June"

Not launch but details.  

Then told us to wait longer for "lower-priced" gaming optimized Vega. I interpret that as let us sell these Vega aim at professionals with high profit margin first for awhile until price for HBM2 come down considerably.  Vega for gamer in 2018.

Already have it's called Nvidia GTX 1080ti ....

plus the fact that along the line Pascal is the one architecture which saw an exponential growth in performance. when jensen huang introduced Pascal, Volta architecture was included in the presentation roadmap chart showing another exponential increment.

dang...

AMD seems to be the underdog on both fronts... while things look good (or at least, okay) for Ryzen, Intel will strike back soon with Gen-8 and 9... Nvidia will do the same with Volta. the delay in Volta will probably just improve it even more.

probably should re-split Radeon from AMD so that they each can concentrate building their own products.

not only price, but also power usage.
so they come out an expensive card with high power usage and not better performance card compare to competitor.