The irony of this statement, is that 1070 to 1080ti performance delta is bigger than 770 to 780ti or 970 to 980ti.if you are already willing to jump from 1070 to 1080 ti means you are ready to upgarde within same generation of cards. Get the 1080ti and upgrade to volta. There is a reason Nvidia will release this, like I said buyers such as you will continue to upgrade. They are like apple of graphics cards. No matter what people will upgrade lol.