I don't think anyone can give you a 100% confident answer but since the 1080 Ti is out you have probably seen the one real big price drop on the 1080. Vega might move prices a bit if they offer better price/performance but I can't see the 1080 dropping much more. I am actually surprised the 1070 has dropped more since they are priced so close to the 1080 after the price drop.