Well I guess that really depends on what GPU you have now. If you are able to decently play the games you want, then you could wait. If you are either unable to play or have to turn the settings WAY down and it looks terrible, then buy the 1070. I haven't even heard of any next gen Nvidia cards being talked about yet and the 1080ti doesn't even have a release date the last time I checked so you could be waiting quite a while.