It won't be a factor if they can't deliver high end performance. No one would go for a freesync monitor if the RX Vega is slower than the 1080.
Hopefully its faster, but my optimism has gone away completely the more they've been using these fake marketing moves and adding alternative costs and crap like that, it leads me to believe it really is an extremely inferior product.
One year late and its got more power consumption, slower than the 1080 while having more transistors than the 1080ti and being bigger in die size, that is a HUGE failure if you ask me. I'd fire Raja right now and everyone who worked on this card.
I think their biggest hope now is to upscale Polaris, its shown to be an amazing card for DX12 and Vulkan, heck add in 200 more shaders and something like a RX 585 can beat the GTX 1070 in Doom Vulkan!
The RX 580 8GB now easily wins over the 1060 in DX12 and Vulkan, it's not even a competition in most games, where the 580 has up to 12fps advantage in some cases and scenes, on average good 6-7fps advantage!
Upscale the RX 580, double the shaders with a clock of 1500MHz its likely not going to use more power than Vega, we are looking at around 350W. They can add in tighter binning, better clock gating and can shave off 20-40W easily!