Below are the currently expected launch dates of NVIDIA's new cards:
GeForce GTX 1180: 30th August GeForce GTX 1170/1180+: 30th September GeForce GTX 1160: 30th October
Via: VideoCardz
GeForce GTX 1180: 30th August GeForce GTX 1170/1180+: 30th September GeForce GTX 1160: 30th October