4k medium 60fps to 1440p 100+fps is still a huge difference
will a 1080 do 1440p at 100+fps on medium settings in most games? yes, would there be any point?
imo medium settings on most games just to get 100+ fps would not be worth it, would rather hav higher quality settings and then accept 60 fps+
BUT thats the 1080, there is noway the 1070 will do the same, they already (as predicted) cheaped out and only used gddr5, already a sign of how they are gimping it, would indicate we should expect further "gimp"
not to mention that gtx1080 reference model, shows sign of high temp in normal load/use, and throttles, which means the "advantage" over tianX and 980ti gets lowered even more
https://www.youtube.com/watch?v=myDYnofz_JE&feature=youtu.be
in "older" games 100+fps even on ultra on 1440p no problem, but even with current titles, Doom4, GTA5, Rise of the Tomb Raider, Hitman, such, there is just no way on earth the 1070 will do 100+ FPS on 1440p,
without sacrificing graphical quality to such a degree it should be reconsidered and "accept" a 60+ fps with good quality settings instead..
ofc thats just my opinion, any1 is free to lower quality settings to get higher FPS; i just cant see the point to play on medium on 1440p in gorgeous games, to get such high FPS on a card that wasnt meant for it